Very neat solution to the old problem of holding the battery in place. Designed for Yuasa YTX5L , but can also be used for the shorter Yuasa YTX4L batteries with the spacers supplied. Installation is relatively straightforward. Simply insert the side brackets into the slots of the battery tray designed for OEM style Horseshoe oil tank and secure the battery with the 5mm thick upper bracket. There are threads in the upper bracket to mount the 30A circuit breaker supplied.