--- product_id: 10888009 title: "Starrett Combination Set with Square, Center and Reversible Protractor Head and Blade - 12\" Blade Length, Cast Iron Heads, Hardened Steel, 4R Graduation Type - C435-12-4R" brand: "starrett" price: "Β£458.68" currency: GBP in_stock: true reviews_count: 9 category: "Starrett" url: https://www.desertcart.co.uk/products/10888009-starrett-combination-set-with-square-center-and-reversible-protractor-head store_origin: GB region: United Kingdom --- # 12" hardened steel blade 0-180Β° reversible protractor lockable adjustable square head Starrett Combination Set with Square, Center and Reversible Protractor Head and Blade - 12" Blade Length, Cast Iron Heads, Hardened Steel, 4R Graduation Type - C435-12-4R **Brand:** starrett **Price:** Β£458.68 **Availability:** βœ… In Stock ## Summary > πŸ“ Measure Like a Pro, Build Like a Boss ## Quick Answers - **What is this?** Starrett Combination Set with Square, Center and Reversible Protractor Head and Blade - 12" Blade Length, Cast Iron Heads, Hardened Steel, 4R Graduation Type - C435-12-4R by starrett - **How much does it cost?** Β£458.68 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/10888009-starrett-combination-set-with-square-center-and-reversible-protractor-head) ## Best For - starrett enthusiasts ## Why This Product - Trusted starrett brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Trusted Legacy Tool:** Starrett’s American craftsmanship delivers a lifetime of reliable performance for pros and DIYers alike. - β€’ **Precision That Lasts:** Engineered with hardened steel and cast iron heads for unmatched durability and accuracy. - β€’ **Effortless Adjustability:** Lockable assembly and smooth bolt engagement ensure stable, precise positioning every time. - β€’ **Clear, Glare-Free Readings:** Satin chrome finish with engraved graduations for quick, strain-free measurements. - β€’ **Versatile Measurement Mastery:** Includes square, center, and reversible protractor heads for every critical layout and angle. ## Overview The Starrett Combination Set C435-12-4R features a 12-inch hardened steel blade with cast iron heads, including a lockable square, center head for locating centers, and a reversible protractor with 0-180Β° double graduations. Designed for precision and durability, this versatile toolset offers glare-free, engraved markings and smooth adjustability, making it the go-to choice for professionals and serious DIYers seeking lifetime accuracy and reliability. ## Description Starrett Combination Set with Square, Center and Reversible Protractor Head and Blade - 12" Blade Length, Cast Iron Heads, Hardened Steel, 4R Graduation Type - C435-12-4R: Construction Rulers: desertcart.com: Tools & Home Improvement Review: The best, and worth every cent - You can spend your money on the cheaper Empire or Stanley combo squares available at Home Depot/Lowes. You'll then spend the rest of your time squinting trying to read the things. The satin chrome finish on the Starrett rules make them worth twice their cost. Glare-free, easy-to-read, and exceptionally accurate, these Starrett tools are lifetime tools. Look on Ebay, and you'll see Starrett squares that are 50+ years old going for top dollar. These are the finest squares available. As a cabinetmaker, I use my Starrett squares for layout work all day, every day. Of all my hand tools, this square has brought me the most unqualified performance and enjoyment of any tool I own. The action is smooth, the gradients on the rule and protractor are precise and clear, and the quality is beyond compare. This is typical of all Starrett products. Starrett is not flashy and not given to gimmicky marketing tricks. They just produce top quality tools. Period. Precise measurements and layouts make all the difference in woodworking and machining, and you will get what you pay for. I would recommend any Starrett product. For maximum versatility, consider purchasing a 24" rule to go with your square (McMaster-Carr, $73). It is interchangeable with the 12" rule supplied with this kit. It allows extra measurement range and I use mine almost exclusively. You might also consider getting a smaller square, like a 6". Experiment with your squares, and you'll be amazed at everything you can do with them. You can measure inside dimensions of cabinet openings, run parallel lines, and a million other things. Easily the most useful tool you'll ever own. What else can I say? Starrett is good old American quality built in Massachusetts. Yankee ingenuity at its best. Review: Quality measurement tool for critical applications... - It was tough for me to break down and spend the money on this Starrett combination square, but I am so glad that I did. I have used a few different combination squares in my 22 years of woodworking; Starrett has always proven to be the most accurate and last the longest. I bought a $40 square several years ago and noticed it was just a little off from being square. When I put the Starrett square against my $40 square, you can really notice the difference of how far off my cheaper square is. I compared the Starrett square with my machinist protractor and they matched up. So I checked all the squares in my shop with the Starrette and all but one were off by around .75 degrees. I know they were not perfectly square before checking them, but it is now very nice to have something that is perfectly square so that I can properly set my machines. This item arrived without an oil protective coating. I like that since I don't like to have to do a lot of cleaning before using a tool. Before I used it, I applied a good coat of Renaissance wax to help the parts slide well and protect it from rusting. This method of protecting my metal tools has proven very good in my high humidity environment. The ruler has a satin finish and the lines/numbers are engraved. It is very easy to read and the lines are very thin so you can get precise measurements (unlike stamped or CNC'd rulers). The adjustment knobs are also very easy to handle compared to my other squares. The square arrived in a quality plastic case with cut foam inserts for each of the pieces. ## Features - Easy to Use - The square head can be moved up and down on the rule with a lockable assembly and a specially designed bolt to engage the slot for stability and versatility while measuring. - Perfect Attachment - The Center Head is an available attachment that provides an easy means of accurately locating the center of cylindrical or square work. - Get Accurate Measurements - The protractor head has revolving turrets with direct-reading double graduations, a full 0 to 180-Degree range in opposite directions which permits accurate and quick direct reading of angles above or below the blade. - Complete Quality Made Tool - The set includes the rule, square, protractor, and center heads that are made from durable hardened steel, which can withstand even the most strenuous jobs. It's perfect for any construction project or DIY task. - Versatile Layout Tool - Starrett squares are offered in a practical variety of styles to suit the needs of the individual, whether it be a toolmaker, mechanic, carpenter, or a "do-it-yourself" homeowner. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000KUA2OO | | Best Sellers Rank | #199,786 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #273 in Carpentry Squares | | Date First Available | December 13, 2006 | | Is Discontinued By Manufacturer | No | | Item Weight | 2.4 pounds | | Item model number | C435-12-4R | | Manufacturer | Starrett | | Product Dimensions | 12.4 x 6.3 x 1.4 inches | ## Product Details - **Brand:** Starrett - **Color:** Black - **Graduation Range:** 8ths, 16ths, Quick Reading 32nds, 64ths Inches - **Material:** Hardened Steel, Cast Iron - **Style:** Combination Set with Square, Center and Reversible Protractor Head and Blade ## Images ![Starrett Combination Set with Square, Center and Reversible Protractor Head and Blade - 12" Blade Length, Cast Iron Heads, Hardened Steel, 4R Graduation Type - C435-12-4R - Image 1](https://m.media-amazon.com/images/I/517ZxxOjaOL.jpg) ## Available Options This product comes in different **Model** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ The best, and worth every cent *by L***S on July 25, 2004* You can spend your money on the cheaper Empire or Stanley combo squares available at Home Depot/Lowes. You'll then spend the rest of your time squinting trying to read the things. The satin chrome finish on the Starrett rules make them worth twice their cost. Glare-free, easy-to-read, and exceptionally accurate, these Starrett tools are lifetime tools. Look on Ebay, and you'll see Starrett squares that are 50+ years old going for top dollar. These are the finest squares available. As a cabinetmaker, I use my Starrett squares for layout work all day, every day. Of all my hand tools, this square has brought me the most unqualified performance and enjoyment of any tool I own. The action is smooth, the gradients on the rule and protractor are precise and clear, and the quality is beyond compare. This is typical of all Starrett products. Starrett is not flashy and not given to gimmicky marketing tricks. They just produce top quality tools. Period. Precise measurements and layouts make all the difference in woodworking and machining, and you will get what you pay for. I would recommend any Starrett product. For maximum versatility, consider purchasing a 24" rule to go with your square (McMaster-Carr, $73). It is interchangeable with the 12" rule supplied with this kit. It allows extra measurement range and I use mine almost exclusively. You might also consider getting a smaller square, like a 6". Experiment with your squares, and you'll be amazed at everything you can do with them. You can measure inside dimensions of cabinet openings, run parallel lines, and a million other things. Easily the most useful tool you'll ever own. What else can I say? Starrett is good old American quality built in Massachusetts. Yankee ingenuity at its best. ### ⭐⭐⭐⭐⭐ Quality measurement tool for critical applications... *by A***D on October 3, 2012* It was tough for me to break down and spend the money on this Starrett combination square, but I am so glad that I did. I have used a few different combination squares in my 22 years of woodworking; Starrett has always proven to be the most accurate and last the longest. I bought a $40 square several years ago and noticed it was just a little off from being square. When I put the Starrett square against my $40 square, you can really notice the difference of how far off my cheaper square is. I compared the Starrett square with my machinist protractor and they matched up. So I checked all the squares in my shop with the Starrette and all but one were off by around .75 degrees. I know they were not perfectly square before checking them, but it is now very nice to have something that is perfectly square so that I can properly set my machines. This item arrived without an oil protective coating. I like that since I don't like to have to do a lot of cleaning before using a tool. Before I used it, I applied a good coat of Renaissance wax to help the parts slide well and protect it from rusting. This method of protecting my metal tools has proven very good in my high humidity environment. The ruler has a satin finish and the lines/numbers are engraved. It is very easy to read and the lines are very thin so you can get precise measurements (unlike stamped or CNC'd rulers). The adjustment knobs are also very easy to handle compared to my other squares. The square arrived in a quality plastic case with cut foam inserts for each of the pieces. ### ⭐⭐⭐⭐⭐ Quality and accuracy is still there. *by T***. on April 21, 2025* Before college, I worked in the family business. Wood dimension tolerances of plus-or-minus 0.001". Occasionally to 0.0001" (yes, you can work wood to tolerances of one ten-thousands of an inch.) I have great respect for Starrett. The tools never let us down. ## Frequently Bought Together - Starrett Combination Square Set for Machinists and Woodworkers - Includes Reversible Lock Bolt, Hardened Steel Scriber, and Spirit Levels in Square and Protractor Heads - C435-12-4R - Starrett Dial Caliper with Adjustable Bezel, Precision Measurement Tool for Machinists, Hardened Stainless Steel - 0-6" Range, 0.001" Graduations, Durable Multifunction Caliper - 3202-6 - Starrett 6-Inch Spring-Tempered Steel Rule with Inch Graduations - Ideal for Metalworking and Engineering - Satin Chrome Finish, 4R Graduations, 3/64-Inch Thickness - C604RE-6 --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/10888009-starrett-combination-set-with-square-center-and-reversible-protractor-head](https://www.desertcart.co.uk/products/10888009-starrett-combination-set-with-square-center-and-reversible-protractor-head) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-16*