... 1. Trenching Bit Trenching bits for trenching beside the road Kennametal Code is like RL08, RL09, RL07 etc.. 2. ... Machine. Specifications with Round shank19. 4mm and 22mm. Wirtgen Code is like W4, W5, W6, W7, W1-13 etc ... ., Kennanmetal Code is like RP11, RP10, RP14, RP20 etc. 3. ... bits for soil stabilizers, commonly use round shank, Wirtgen Code is like W6 / 22 etc. Actually we can ...