Material The bit is made of high quality tungsten steel alloy, the body is made of titanium steel (HSS). Size Cutting diameter length: 10/15/22/30mm; sleeve : 8 mm handle. Features: 2 micro-grain C2 carbide tips for increased strength and greater resistance. Usage: for handcrafting or woodworking; MDF, solid wood, particle board, plywood, wooden door frames, wooden window frames, cabinets and boxes, etc. Delivery contents Set of 4 wood cleaning router bits 8 mm. 8 mm cleaning drill bit set Features: Color: blue, silver tone. Material: carbide alloy. Shank type: Round shank. Diameter of the bit: 8 mm handle. Cutter diameter: 10/15/22/30 mm. Features: 1. Mainly used for cutting and smoothing a variety of materials from wood, plywood, MDF and other wood composites, plastic, fiberglass, solid surface, etc.< /p> 2. Use with CNC machine tools and other automatic routers, as well as table-mounted and hand-held portable routers. Contents: < p>4 tips.