Dee Safety Pin Shackle (TYPE D15) The D15 series highlights GN Rope Fittings’ commitment to providing robust, high-capacity rigging solutions for demanding industrial environments. These dee-style safety pin shackles are specifically engineered for heavy-lift applications where a secure, permanent, or long-term connection is required. Manufactured from premium alloy steel, the D15 series provides a critical interface that maximizes safety and performance in maritime, offshore, and heavy-infrastructure operations.