Marine Springless Towing Hook Springless towing hook is simple designed marine manual release towing hook, used to release mooring ropes quickly under emergency situation. Spingless Towing Hook is easy to operate and light in weight. Standard: CB788-74 Smooth Forged Surface without Cracks Normalizing Treatment before Machining Anti-rust painting on all surface of parts and lubricated on friction surface Certificates of Quality Inspection Material: Carbon Steel Springless Towing Hook Certificate: ABS,LR,CCS,BV,DNV, etc. Springless Towing Hook Specification