Hexagon wrenches feature all metal construction, and swivel head. These wrenches make driving and removing optical hex nuts or star nuts easy. The nut is easily ejected by pushing the spring loaded swivel head. Color coded, the blue wrench fits european star nuts, the brown wrench fits far-eastern oversized nuts (1.27mm screw) and silver wrench fits domestic nuts (1.1mm screw size). The 52.750 nut ejecting optical hex driver set is supplied in a vinyl carying pouch.