Fits Hitache, Bosch, and Makita etc., SDS Max Chuck; Allows SDS-Plus bits to be used in a SDS-Max tool; Converts SDS Max Shank to SDS-Plus Shank; Made of high quality steel, ultra durable construction meets the demonds of frequent use; The drilling with this adapter is precise and effortless; Overall Length: 8″(200mm); Overall Head Dia.: 1-5/16″(35mm); Net Weight: 1LB and 3 oz;