Bondhus 16537 is an allen wrench set with ball end, metric sizes. It includes twelve wrenches from 2 mm to 10 mm, each featuring a ball end on one side and a standard hex tip on the other. The ball end offers better access to hard-to-reach places, making it easy to get into tight spots and make adjustments. The wrenches are crafted from Protanium high-torque steel and are covered by Bondhus' lifetime warranty.