Road Planing bits,Trenching bits,Asphalt cutter,Concrete cutter,Stabilizer bits,Road Picks,Road ... is like RP11, RP10, RP14, RP20 etc.2. Trenching BitTrenching bits for trenching beside the roadKennametal Code is like RL08, RL09, RL07 ... to customers' samples or other drawings and requests. trench picks trenching bits