Probe Industries 5115 Carbon Steel Wrist Pins are designed to deliver the ultimate in weight reduction while maintaining maximum strength. They are manufactured from aircraft quality chrome-moly. All our 5115 pins are centerless ground, heat treated, and end ground, and will work in full floated or press fit applications. They are available chamfered for use with wire locks, as-well-as straight cut to suit applications in which spiral locks are to be used.