Wera Tools - 7779/1 Adapter insert, 9x12 mmAdapter insert ror the use of square plug in tools 14x18 mm in torque wrenches with internal square 9x12 mm; for torque wrenches of the Click Torque X series with 9x12 mm holder. Features Square insert tool 9x12 mm For torque wrenches of the Click Torque X series with 9x12 mm holder For the use of square insert tools 14x18 mm in torque wrenches with internal square 9x12 mm. With safety pin The chrome vanadium steel version makes the plug in tools