A set of three mini ratchet heads in 1/4"D, 3/8"D & 1/2"D, ideal for tight or restricted access applications. Allows standard sockets to be used as an alternative to fixed crows foot wrenches. 72 teeth ratchet mechanism with locking detent.Max torque: 1/4"D: 78Nm (8kg-m; 57lb-ft); 3/8"D, 1/2"D: 245Nm (25kg-m; 180lb-ft). Length: 1/4"D: 48mm; head depth: 9mm; 3/8"D, 1/2"D: 62mm; head depth: 11mm. Ideal for use in combination with an extension bar & torque wrench, to allow torque setting of hard to reach components.