Using forYou can use these keyhole router cutter bits create t slots for custom jigs and hold-downs or for picture frame keyhole hanging. Premium MaterialThese T-slot router bits made of carbide alloy and 45 carbon steel, with the sharp blade and sturday shank, silver induction brazing for maximum strength and durability. Heat-resistant Router BitsSolid hardened steel bodies with Anti-kickback design, build-up & heat resistant Teflon coating for a longer lasting edge. Applicble Machines & MaterialThes t-slot router bits for use on CNC and other automatic routers as well as hand-held and table-mounted portable routers. Suitable for cutting solid wood, MDF, Plywood, partical board etc.. 8mm Shank T- Slot Router Bit/ Keyhole Router Bit Set Features: Industrial grade micro grain carbide cutter. Alloy blade with high-grade welding, stable quality, high efficiency. Solid hardened bodies with anti-kickback design. Build-up & heat resistant teflon coating. Baked on heat resistant coating prevents build-up of sawdust, resin, and pitch. Specifications: Color: Yellow Shank Size: 8mm Blade Material: YG6 Carbide Alloy Body Material: 45 Carbon Steel Package Includes: 3pcs 8mm Shank Router Bit Please Note:</ 1. The router bit is sharp enough, please keep it away from children. 2. This router bit only for use on CNC and other automatic routers as well as hand-held and table-mounted portable routers. Please don't for use on electric drill or other machines. 3. This router bit is working for wood, please don't use it cut sand, stone or metal. 4. After use, please wipe it with protective oil and keep it in box, It's conducive to increase service life. Size: as picture shown