The NOCO GBC003 HD Precision Boost battery clamps are heavy-duty tools designed for 12-volt gasoline and diesel engines. The HD Precision clamps feature a crocodile clamp profile and are designed to fit battery terminals of any shape or size, from small battery terminals in tight spaces, top or side terminals to large battery terminals. The strong and durable springs of the clamps provide maximum current flow with minimal power loss. The HD Boost Precision clamp components do not melt or emit smoke, have high current-carrying capacity, and are reinforced with full metal construction. Heavy-duty battery clamps designed for 12-volt gasoline and diesel engines. Crocodile-style design for starting batteries in hard-to-reach places and with large terminals.