Towing Hooks are specially designed for towing with steel and nylon (polypropylene) ropes with remote quick release function. They have a standard from 15 Ton up to 65 Ton S.W.L.. Pneumatic remote control is a standard option. Available Type: 1: manual release spring marine towing hook 2: manual release marine harbour towing hook 3: manual release disc marine towing hook 4: pneumatic spring marine towing hook 5: pneumatic disc marine towing hook 6: pneumatic marine harbour towing hook 7: single quick release mooring hook 8: double quick release mooring hook 9: triple quick release mooring hook 10: quadruple quick release mooring hook Material: Material of hook:EH36 Material of protect panel:Q345B Material of bolt:35CrMo Pneumatic Release from wheel house Manual Release at hook body