The Quick Fist keeps anything from tools to boat hooks firmly in place in any vehicle or vessel, while the Super Quick Fist secures larger equipment like fire extinguishers, oxygen or CO2 tanks to your boat or truck for easy transport. Heavy-duty, UV-resistant rubber withstands extreme heat or cold and will not rust or corrode. Mounts easily with #10 (5 mm) bolts or screws. Quick Fist is sold in pairs. Super Quick Fist is sold individually.