These locator fasteners are used with flex receivers. In combination, these parts are designed to be mounted on fixture bases and plates for highly accurate locating and positioning and allow for precise repeatability when moving to a new machine or different operation. Precise +/- 0.008 mm repeatability when plates are mounted horizontally or +/- 0.01 mm repeatability when plates are mounted vertically. The body is made from SAE-4140 alloy steel , nitrocarburized treated. The cam handle is made from heat treated SAE-4140 alloy steel with a black oxide finish. Balls are made from SAE-52100 steel.