T-slot keyhole router bit set with 2 different sizes to suitable for 5/8 inch & 7/16 inch hex bolt.Industrial grade C3 micro-grain carbide blades, high performance for processing solid wood, particleboard, MDF, plywood, etc.Enable woodworkers to drill holes without passing through the material when a clean and precise bottom to a hole.Designed for cut long t slots as well as to make keyhole slots for hanging purposes, suitable for wood perforation, spherical door tip installation, drawer tip. 1/4 Inch shank T-slot router bits, suitable for hand held electric drill, stand motor-driven drilling machine and mobile ribbon type magnetism drilling machine.Mesee 1/4 Inch Shank T Slot Keyhole Router Bit Set- Two pieces t-slot cutters in different sizes for different slots, can meet your needs in the woodworking project.- Solid hardened steel bodies with anti-kickback design, high toughness, high abrasion resistance, impact resistance.- Industrial grade C3 micro-grain tungsten carbide blades, sharp edge, high hardness, accurate positioning, smooth cutting.- Useful for cut long t slots as well as to make keyhole slots for hanging purposes, wood perforation, spherical door tip installation, drawer tip, plastic products, etc.- Ideal woodworking tool can be used to processing wood such as MDF, solid wood, particle board, plywood and so on.- Suitable for hand held electric drill, stand motor-driven drilling machine and mobile ribbon type magnetism drilling machine.Specification Body Material : Alloy Steel Blade Material : Carbide Alloy Shank Diameter : 1/4 inch (6.35mm) Blade Diameter : 5/8 inch (15.9mm) & 7/16 inch (11mm) Warm Tips- The router cutters are very important to use the normal casing size, the tool must be fully inserted into the casing and tighten firmly, so that we can use in the process of cutting tool must provide clamping force, not only partially inserted into the casing, otherwise it will lead to fracture caused damage to the tool shank.- Please always notice to add some coolant (like water) when operating, in case the material temperature will get very high even get smoke because of the long time operating.- Don't cutting ferrous metal and non wood materials, such as : steel, iron, sand, etc.Package Includes1 x T-Slot Cutter Router Bit for 5/8" Hex Bolt1 x T-Slot Cutter Router Bit for 7/16" Hex Bolt.