All KPMI® keepers are single-point machined from high tensile strength billet material (with the exception of forged multi-bead styles).What this means is that each keeper is machined from billet high tensile strength material. After machining, the keepers are split, tumbled and then heat treated. At KPMI® we pay close attention to the surface finish and tolerance of; all diameters, taper angle, and bead location. This type of detail insures repeatability you can count on.