This wrench is 10mm, Long Arm is 6.7 in. Bondhus Hex L-wrench (long) Up to 20 percent stronger, with more torque and twice the wear resistance of standard grades of steel. Environmentally safe, provides better tool grip, resists solvents and is 5 times more corrosion resistant than competitor finishes. Chamfered tips for fast insertion and full tool engagement in the screw head.