The Allen 30mm Dynamic Flip Flop Block is designed for optimal performance, pivoting around a central fixing point to keep the rope close to the deck, mast or boom. This block features a laser-cut stainless-steel body and backing plate, ensuring precise measurements and a high-quality finish. Its dynamic bearings, which use twin rows of stainless-steel ball bearings on a stainless-steel rail, provide superior load-carrying ability and longevity compared to other bearing systems. Plus, the removable clevis pin allows for easy access and installation in any orientation, making it suitable for various control lines on dinghies and keelboats.