Description: 20Pcs Woodworking Polishing Head Set 1/8 Inch Shank Router Bit & 1/4 Inch Router Burrs Specification: Router Burrs: Material: 45# Steel Shank Diameter: 1/4" Shank Length: 58mm Router Bits: Shank Length: 39mm Shank Diameter: 1/8" Material: High Speed Steel Feature: - Come with 10 pieces 1/4 inch shank rotary burrs and 10 pieces 1/8 inch shank router bits, enough quantity to replace your old ones, making more convenient life. - Rotary Burrs Material: This wood rasp bit is made of high 45# steel, which has been hardened and tempered, durable to use, having better cutting effect. - Rotary Burrs Size: The total length of the black rotary burr is 2.3 inch/58 mm, the shank length is 1.2 inch/29 mm and the shank diameter is 1/4 inch/6.3 mm, available in 10 different file shapes. Suitable for grinding, polishing, shaping and burnishing softwood, plastics and rubber surfaces, please note that it is not applicable to hardwood, - Various Bits: The combination of the large and small