NOCO GBC003 Boost HD Precision Battery Clamps are a heavy-duty clamp made for 12-volt gas and diesel engines. The HD Precision Clamps feature a needle-nose clamp profile. Designed to fit any shape or size battery terminal, from small battery terminals in tight places, top and side post batteries, through large battery terminal sizes. The robust and rugged clamp springs provide maximum current flow with minimal power loss. The Boost HD Precision accessory is no-melt and smoke-free, has a high current transferability, and is reinforced with all metal construction.