Park tool 3 way hexagonal wrench awpark tool introduced the bicycle industry to the 3 way hex wrench set more than 20 years ago their latest versions are stronger and more comfortable than ever they fit perfectly in the palm of the hand and provide tremendous leverage features aws 1 4mm 5mm and 6mm hex set aws 3 2mm 25mm and 3mm hex set hexes are made from bondhus protanium high torque industrial steel and are heat treated for long life chamfered tips for a perfect fitbuy park too