Tail board blocks like this ship without a hook or shackle for attachment. Many of our customers look for this kind of block when they have their own shackle or hook, or an engineered application. The 402 series feature complete alloy construction, which yields an extremely high Working Load Limit in a lightweight package! It comes standard with a bronze bushing and is easily reeved. Each block is fatigue rated prior to shipment. RFID equipped.