A Hook Hook Turnbuckle is a very common steel turnbuckle throughout the rigging industry. The hook on the end makes for easy connections/disconnections for the turn buckle. With the body of the turnbuckle having a reverse thread on each end, it makes the assembly exceptionally easy to tighten and loosen by simply twisting the body of the turnbuckle. The hook does not offer the strength a turnbuckle jaw or turnbuckle eyegalvanized steel turnbuckle. Made to meet or exceed the performance requirements of ASTM F - 1145 (formerly Federal Specification FF-T-791),turnbuckles or other rigging supplies, please contact our sales staff and they will be happy to help.