Description: Highly durable, can be utilized for the most rigorous industrial applications. Featured with double flutes and straight shank. Designed to cut deep or shallow T grooves. Suitable for softwoods, hardwoods, chipboard, plywood and etc. Use on CNC and other automatic routers as well as hand held and table mounted portable routers.(Routers are not included here) Specification: Material: Alloy Color: Silver 1/4 Shank Diameter: 6.35 mm 1/2 Shank Diameter: 12.7 mm Blade Width: 31.0 mm 1 - 1/4*3/32 Blade Height: 2.38mm 2 - 1/4*1/2 Blade Height: 3.17mm 3 - 1/4*5/32 Blade Height: 3.96mm 4 - 1/4*3/16 Blade Height: 4.76mm 5 - 1/4*1/4 Blade Height: 6.35mm 6 - 1/4*5/16 Blade Height: 7.96mm 7 - 1/4*3/8 Blade Height: 9.52mm 8 - 1/4*1/2 Blade Height: 12.7mm 9 - 1/4*5/8 Blade Height: 15.9mm 10 - 1/2*3/32 Blade Height: 2.38mm 11 - 1/2*1/8 Blade Height: 3.17mm 12 - 1/2*5/32 Blade Height: 3.94mm 13 - 1/2*3/16 Blade Height: 4.76mm 14 - 1/2*1/4 Blade Height: 6.35mm 15 - 1/2*5/16 Blade Height: 7.96mm 16 - 1/2*3/8 Blade Height: 9.52mm 17 - 1/2*1/2 Blade Height: 12.7mm 18 - 1/2*5/8 Blade Height: 15.9mm Package Includes: 1 Piece T-Slot Router Bit Note: Please allow 0-2mm measuring deviation due to manual measurement.