HD Precision Boost Battery Clamps NOCO GBC003 Boost HD Precision Battery Clamps are a heavy-duty clamp designed 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 are no-melt and smoke-free, have high current transferability, and are reinforced with all metal construction. Heavy-duty battery clamp design for both 12-volt gas and diesel engines. Needle-nose design for jump starting hard-to-reach and oversized battery terminals. Made from durable, heat stabilized 8 AWG silicone wire that maintains its flexibility in cold weather environments. Designed to efficiently transfer maximum current flow with minimal power loss. Compatible with the GB20, GB40 and GB50 UltraSafe Lithium Jump Starters.