Park aws7 hex wrench and torx key set 4 5 t25 park tool introduced the bicycle industry to the 3 way hex wrench set more than 20 years ago our latest version includes the now commonly used t25 torx style stronger and more comfortable than ever they fit perfectly in the palm of the hand and provide tremendous leverage 4mm hex 5mm hex and t25 torx style set made from bondhus protanium high torque industrial steel heat treated for long life chamfered tips for a perfect fit perfect