--- product_id: 253545336 title: "3Pcs High-Speed Steel Step Drill Bit Set with Automatic Spring Loaded Center Punch, 4-12mm/4-20mm/4-32mm Drill Bits Set for Sheet Metal Hole Drilling" brand: "cochanvie" price: "£7.50" currency: GBP in_stock: true reviews_count: 8 category: "Cochanvie" url: https://www.desertcart.co.uk/products/253545336-3pcs-high-speed-steel-step-drill-bit-set-with-automatic store_origin: GB region: United Kingdom --- # 3-step drill bits cover 4-32mm holes Titanium-coated HSS for durability Automatic spring-loaded center punch 3Pcs High-Speed Steel Step Drill Bit Set with Automatic Spring Loaded Center Punch, 4-12mm/4-20mm/4-32mm Drill Bits Set for Sheet Metal Hole Drilling **Brand:** cochanvie **Price:** £7.50 **Availability:** ✅ In Stock ## Summary > 🔩 Drill Smarter, Not Harder — The Ultimate Step Bit Set for Pros Who Demand Precision ## Quick Answers - **What is this?** 3Pcs High-Speed Steel Step Drill Bit Set with Automatic Spring Loaded Center Punch, 4-12mm/4-20mm/4-32mm Drill Bits Set for Sheet Metal Hole Drilling by cochanvie - **How much does it cost?** £7.50 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/253545336-3pcs-high-speed-steel-step-drill-bit-set-with-automatic) ## Best For - cochanvie enthusiasts ## Why This Product - Trusted cochanvie brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Last:** Titanium nitride coating extends bit life and keeps drilling cool under pressure. - • **Effortless Accuracy:** Automatic spring-loaded center punch guarantees perfect hole placement—no slip-ups. - • **All-in-One Precision:** Replace 28 bits with just 3 versatile step drills, saving space and time. - • **Smooth & Fast Cutting:** Two-flute design ensures burr-free, clean holes every time. - • **Multi-Material Mastery:** Ideal for sheet metal, plastic, fiberglass, and wood—your go-to for renovation and repair. ## Overview This 3-piece High-Speed Steel Step Drill Bit Set features titanium nitride coating and a two-flute design for fast, smooth, and durable drilling. Covering hole sizes from 4mm to 32mm, it replaces multiple bits and includes an automatic spring-loaded center punch for precise starts. Perfect for sheet metal, plastic, and fiberglass, it’s engineered to reduce burrs and extend tool life, making it an essential upgrade for professional and DIY toolkits alike. ## Description Step Drill Bit Set:Feature:- High speed, titanium nit-ride coated steel Replaces 28 separate drill bits Two fluted design for fast, smooth cutting. - When inject cold water while working, can effectively extend the service life of the drill bit. Recommend drilling rate of 250-250 RPM.- 1mm thickness can be operated by hand drill, 2~3mm please use bench drill. The drill must continue to cool down when it is working, and it is not easy to burn.- According to the need to process different diameter holes, you can achieve one-time processing of large holes, no need to replace the drill bit and positioning hole.-Automatically Deburrs Holes As You Drill -Two-Flute Design Gives You Faster And Smoother Cutting -Titanium Nitride Coating For Cooler Running -Quick-Change 1/4'' Hex Shank -High Speed Steel For Long Life -These Step Drill Bits Are Ideal For Variety Of Materials From Metal, Plastic, Fiberglass To Wood -They Also Help To Enlarge Existing Holes -The Two Flute Design Tips Can Make The Penetration Faster Without Chipping Specifications:- Shank: 1/4" Quick Change Hex Shank- Finish: Titanium- Material: HSS (Suitable for use in the hardness below 25 degrees workpiece, such as iron plate, copper plate, aluminum plate, the thickness of the plate of step is Review: Very nice! - Been using them for a while and they have been holding up very good! the punch works well too. Review: Not sharp enough - Over heats quick ## Technical Specifications | Specification | Value | |---------------|-------| | Brand | Cochanvie | | Cutting angle string | 90 Degrees | | Cutting diameter | 12 Millimeters | | Finish type | Titanium | | Material | High Speed Steel (HSS) | | Shank type | Hex | ## Product Details - **Cutting angle string:** 90 Degrees - **Cutting diameter:** 12 Millimeters - **Finish type:** Titanium - **Material:** High Speed Steel (HSS) - **Shank type:** Hex ## Images ![3Pcs High-Speed Steel Step Drill Bit Set with Automatic Spring Loaded Center Punch, 4-12mm/4-20mm/4-32mm Drill Bits Set for Sheet Metal Hole Drilling - Image 1](https://m.media-amazon.com/images/I/61yyW8EFs1L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Very nice! *by R***R on 25 October 2022* Been using them for a while and they have been holding up very good! the punch works well too. ### ⭐⭐⭐ Not sharp enough *by F***I on 30 May 2026* Over heats quick ### ⭐⭐⭐⭐⭐ Does the job *by D***7 on 30 January 2026* Worked fine for me, as the hole to be enlarged was in fiberglass, therefore relatively soft. Not sure it would work as well with hard metal. The Automatic Spring Loaded Center punch is a convenient little tool to have ## Frequently Bought Together - Cochanvie 3Pcs High-Speed Steel Step Drill Bit Set with Automatic Spring Loaded Center Punch, 4-12mm/4-20mm/4-32mm Drill Bits Set for Sheet Metal Hole Drilling - GOTOTOP 6Pcs Metric Thread Tap M3-M10 Titanium Coated Hss Drill And Tap Bits 1 4" Hex Shank Screw Taps Tool Set --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/253545336-3pcs-high-speed-steel-step-drill-bit-set-with-automatic](https://www.desertcart.co.uk/products/253545336-3pcs-high-speed-steel-step-drill-bit-set-with-automatic) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-06-21*