Wera Tools - 7772 A Ratchet insert, reversible, 9x12 mmRatchet insert, reversible, for 1 4"" square socket wrench inserts and 1 4"" connecting parts with square drive; for torque wrenches of the Click Torque X series with 9x12 mm holder. Features For torque wrenches of the Click Torque X series with 9x12 mm holder For 1 4"" square socket wrench inserts and 1 4"" connecting parts with square drive Fine toothing with 72 teeth Easy switching by knob Socket lock by push button Data Sheet (PDF)