Flat Wrench Set Set of 7 pieces of open-sided articulated wrenches, 8-17 mm. The keys are made from high quality alloy chrome vanadium steel. sided size 8-10 - 11- 12-13 - 14-17 mm, solid side profile hexagon side with joint profile dvanáctihran, hromvanadiová CrV 6140 steel, satin finish, the system DRIVE AS +