Usage Tips:Flush Trim Bit Set with 2 Different Cutting Height: 1-1/2 Inch(Yellow), 1 Inch(Black), Cutting Diameter: 1/2 Inch Industrial grade C3 micro-grain carbide cutters with double-edged cutting design, high performance, cutting sharper. Ideal woodworking cutting tools can be processing all composite materials, plywoods, MDF, softwoods and so on. 1/4 Inch shank router bits can be use on CNC and other automatic routers as well as hand held and table mounted portable routers. Top Bottom Bearing Trimming Router Bit is great for all your large stock trim applications, can be used with either a top or bottom template. Specification: color: as show Body Material: Solid Hardened Steel Blade Material: Industrial Grade Micro Grain Carbide Shank Diameter: 1/4 Inch/ 6.35mm Cutting Diameter: 1/2 Inch/ 12.7mm Blade Height: 1-1/2 Inch/ 38mm(Yellow), 1 Inch/ 25mm(Black) Balance: +/- .003" tolerance (allowing smooth operation at high RPMs) Package Includes: 2 x Flush Trim Router Bits