Hot Rods By Dean 6-volt battery hold down. It has been engineered to fit underneath seats or any other tight space. It fits Optima 6-volt batteries and is machined from aluminum and black anodized for a long lasting finish and is made entirely in the U.S.A. The kit includes 2 uprights, 1 top hold down and one base plate and all hardware needed to assemble the mount. 2 hold-downs are required for a 12-Volt operating system.