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What Is A Shackle?

Shackles are an extremely strong U-shaped piece of equipment that connects items together and are secured with a pin, spring, or bolt.  Shackles secure topping lifts, halyards, blocks, an anchor, and can hold lines in place.  Examples of sailboat shackles include snap shackles, headboard shackles, D shackles, long D shackles, bow shackles, twisted shackles, and soft shackles. 

Proper usage and maintenance of shackles are essential for ensuring safety and reliability. It is important to inspect shackles regularly for signs of wear, deformation, or corrosion. Properly securing and tightening shackles using appropriate techniques and tools (such as safety wire or shackle keys) helps prevent accidental openings or failures. 

Definition of Marine Terms - Full List