These very strong zinc alloy battery terminal adapters are great for adding multiple accessories and not having it all on one bolt as well as it being very strong and durable, these fit an M8 bolt. These were designed specifically for our scorpion cranking battery, beast cranking battery, and our 12v 100Ah Deep Cycle batteries. It includes both the negative and positive terminal each equipped with four M8 stainless bolts for adding accessories.