... with Round shank19. 4mm and 22mm. Wirtgen Code is like W4, W5, W6, W7, W1-13 etc., Kennanmetal ... BitTrenching bits for trenching beside the roadKennametal Code is like RL08, RL09, RL07 etc.. 3. Stabilizer bitsRoad pick ... stabilizers, commonly use round shank, Wirtgen Code is like W6 / 22 etc.Actually we can make road ... customers' samples or other drawings and requests. trench picks trenching bits