316 Swage Stemballs from Petersen are exclusively manufactured at the Petersen factory in England. Forged from low carbon stainless steel 316L (1.4404) every Petersen Marine Swage Stemball is increadibly strong. Petersen has been a manufacturer of A4 stainless Swage Stemballs for many years and during that time has built an industry leading quality system with full material traceability. Petersen swage stemballs can be used with many different wire-rope constructions and spiral strand. As a manufacturer of marine swage stemballs Petersen can offer you an affordable, customised swage stemball to suit your rigging project.