--- product_id: 123610992 title: "Micrograin Carbide Square End Mill - 4 Flute - ISE3/8 4T (1 Piece, 3/8\") - for Milling Alloy Steels, Hardened Steel, Metal & More – Mill Bits Sets for DIYers & Professionals" brand: "speed tiger" price: "£44.31" currency: GBP in_stock: true reviews_count: 10 category: "Speed Tiger" url: https://www.desertcart.co.uk/products/123610992-micrograin-carbide-square-end-mill-4-flute-ise3-8-4t store_origin: GB region: United Kingdom --- # AlTiBN coating for superior heat resistance 4 Flutes for smooth, efficient cutting Micrograin carbide for unmatched toughness Micrograin Carbide Square End Mill - 4 Flute - ISE3/8 4T (1 Piece, 3/8") - for Milling Alloy Steels, Hardened Steel, Metal & More – Mill Bits Sets for DIYers & Professionals **Brand:** speed tiger **Price:** £44.31 **Availability:** ✅ In Stock ## Summary > ⚡ Cut sharper, last longer — own the edge with SPEED TIGER! ## Quick Answers - **What is this?** Micrograin Carbide Square End Mill - 4 Flute - ISE3/8 4T (1 Piece, 3/8") - for Milling Alloy Steels, Hardened Steel, Metal & More – Mill Bits Sets for DIYers & Professionals by speed tiger - **How much does it cost?** £44.31 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/123610992-micrograin-carbide-square-end-mill-4-flute-ise3-8-4t) ## Best For - speed tiger enthusiasts ## Why This Product - Trusted speed tiger brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Precision Perfected:** Achieve professional-grade cuts with ±0.02mm accuracy - • **Heat-Defying Coating:** AlTiBN layer outperforms traditional coatings for longer tool life - • **Ready for Any Project:** Ideal for both DIY enthusiasts and seasoned pros - • **Durability Meets Value:** Micrograin carbide ensures toughness without breaking the bank - • **Versatile Steel Mastery:** Effortlessly mills carbon, alloy, hardened steels & cast iron ## Overview The SPEED TIGER Micrograin Carbide Square End Mill features 4 flutes and a precision tolerance of ±0.02mm, crafted from durable micrograin carbide. Its advanced AlTiBN coating delivers exceptional heat resistance, making it perfect for milling a wide range of steels and cast iron. Designed for both professionals and DIYers, this 3/8" end mill combines high performance with great value, ensuring sharp, accurate cuts every time. ## Description SPEED TIGER Micrograin Carbide Square End Mill - 4 Flute - ISE3/8 4T (1 Piece, 3/8") - for Milling Alloy Steels, Hardened Steel, Metal & More – Mill Bits Sets for DIYers & Professionals: desertcart.com: Industrial & Scientific Review: Works As Advertised - Sharp and true. Does what I expect from a carbide end mill. Review: Great product, worth every penny - Bought these for a hobby. Received them and like that they are packaged individually, thus helping keep them sharp. Used them on a firearm building project and only eneded up using one. But stayed sharp and met the needs of what I was using it for. If your are a hobbyist and looking for some high quality milling bits with out having to pay a premium these are the ones to go to. ## Features - ✅ APPLICATION - Our carbide tools are highly effective at machining various types of steel such as Carbon Steels (~HB225), Alloy Steels (HB225~325), Pre-hardened Steels (up to HRC45), Hardened Steels (HRC40~61), and Cast Iron. - ✅ AlTiBN COATING - This coating, made of titanium aluminum boron nitride (AlTiBN), offers exceptional stability at high temperatures and surpasses the heat resistance of TiAlN, TiN, or TiCN coatings. - ✅ HIGH-PERFORMANCE MATERIAL - This end mill is made from micrograin carbide, which gives it exceptional toughness, durability, and machinability. It performs brilliantly and is an excellent value for its price. - ✅ FINE WORKMANSHIP - Our products deliver outstanding high accuracy with an error of -0.02mm, empowering users to achieve professional cutting quality effortlessly. - ✅ DEDICATED SUPPORT - Please don't hesitate to contact us on desertcart if you need the Cutting Condition Data. We want to ensure you receive the best product that meets your requirements. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07FSLS7X3 | | Best Sellers Rank | #8,792 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Square Nose End Mills | | Brand | SPEED TIGER | | Cut Type | square end | | Cutting Diameter | 9.53 Millimeters | | Cutting Length | 2.5 Inches | | Date First Available | July 23, 2018 | | End Cut Type | Square End | | Finish Type | AlTiBN | | Is Discontinued By Manufacturer | No | | Item Weight | 1.76 ounces | | Item model number | ISE3-8-4T | | Manufacturer | SPEED TIGER | | Material | Carbide | | Number of Cutting Edges | 4 | | Number of Flutes | 4 | | Product Dimensions | 2.5"L x 0.38"W | | Shape | Square | | Size | 3/8 in | | Tolerance Held | Precision | ## Product Details - **Cutting Diameter:** 9.53 Millimeters - **Cutting Length:** 2.5 Inches - **Finish Type:** AlTiBN - **Material:** Carbide - **Number of Flutes:** 4 ## Images ![Micrograin Carbide Square End Mill - 4 Flute - ISE3/8 4T (1 Piece, 3/8") - for Milling Alloy Steels, Hardened Steel, Metal & More – Mill Bits Sets for DIYers & Professionals - Image 1](https://m.media-amazon.com/images/I/61+r2mRFLKL.jpg) ## Available Options This product comes in different **Size, Item Package Quantity** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works As Advertised *by N***J on August 27, 2025* Sharp and true. Does what I expect from a carbide end mill. ### ⭐⭐⭐⭐⭐ Great product, worth every penny *by B***N on January 25, 2025* Bought these for a hobby. Received them and like that they are packaged individually, thus helping keep them sharp. Used them on a firearm building project and only eneded up using one. But stayed sharp and met the needs of what I was using it for. If your are a hobbyist and looking for some high quality milling bits with out having to pay a premium these are the ones to go to. ### ⭐⭐⭐⭐⭐ Works like it should *by M***S on February 2, 2026* Works good on my 1923 endmill --- ## 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/123610992-micrograin-carbide-square-end-mill-4-flute-ise3-8-4t](https://www.desertcart.co.uk/products/123610992-micrograin-carbide-square-end-mill-4-flute-ise3-8-4t) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-27*