Designed for custom ski builds or OEM Yamaha replacement. Replaces OEM Yamaha style waterbox, battery, and fuel tank strap hooks. Strap Hook incorporates a removable 3mm set screw that retains the strap in place so that it cannot come off. This innovative little feature works perfectly for the hard to reach strap hooks where the straps have a tendency to come off. Strap Hook Base for those ever evolving aftermarket hulls and different engine configurations available in today's market the Blowsion Mechanic team consistently ran into problems with having to relocate individual components E.G Exhaust, Battery and Mounting Straps etc... So they went to work and designed a Billet Aluminum Strap Hook Base. Sold Individually.