Suitable for Sealed Lead Acid batteries with 8mm bolt terminal, the ANBI Battery Boss adaptor allows additional accessories to be fitted quickly while retaining the 8mm bolt terminal. Manufactured using high-quality BRONZE C85800, which meets International Automotive Standards. The ANBI Battery Boss also features a 12mm Knurl, where others only have an 8mm Knurl. Increasing the depth of the Knurl provides greater terminal grip.