Wera Tools - 7781 Ring spanner insert, 14x18 mmRing spanner insert, for hexagon screw heads or nuts; for torque wrenches of the Click Torque X series with 14x18 mm holder. Features Square insert tool 14x18 mm For torque wrenches of the Click Torque X series with 14x18 mm holder Application: Hexagon screw heads or nuts With safety pin The chrome vanadium steel version makes the plug in tools suitable for heavy loads Data Sheet (PDF)