The Tylaska T5 Standard Bail Snap Shackle with Black Oxide Finish is one of the most robust snap shackles on the market, made in the USA, ideal for halyards and sheets. It’s meticulously designed and computer optimized using the latest finite element CAD software. The 17-4PH stainless steel construction gives Tylaska shackles the ultimate in strength-to-weight ratios. Tylaska’s patented mathematical curvature of the release mechanism allows the shackles to be easily opened even under tremendous loads. With a detail-oriented assembly process, meticulous finishing, and individual testing of each unit, Tylaska shackles provide discriminating sailors with the ultimate in strength, performance, and durability.