... bits,Trenching bits,Asphalt cutter,Concrete cutter,Stabilizer bits,Road Picks,Road Milling bits,Milling cutter 1. Road planing bitsRoad planing bits are for cutting asphalt road and concrete road. Road planing bits for road milling ... and 22mm. Wirtgen Code is like W4, W5, W6, W7, W1-13 etc., Kennanmetal Code is like RP11, RP10, RP14, RP20 ...