1/4"D x 72 teeth ratchet mechanism. Max torque: 78Nm (8kg-m; 57lb-ft). Length: 48mm; head depth: 9mm. For use with any 1/4"D accessory. Ideal for use in combination with an extension bar & torqure wrench, to allow torque setting of hard to reach components. Larger sizes available, please see Laser Part Nos. 8078 (3/8"D), 8079 (1/2"D). Set comprising all ratchet sizes available, please see Laser Part No. 8080.