Made of iron, steel and copper material with good processing, this battery cable crimping tool kit has nice resistance to corrosion and rust, to withstand humidity, strong and durable for not to break, deform or rust easily, you can store and use them for a long time. Hammer battery has a wide for application, and for use with 8 AWG, 6 AWG, 4 AWG, 2 AWG, 1/0 AWG, 2/0 AWG, 3/0 AWG and 4/0 AWG wire. Features - Color: Assorted. - Material: Steel, iron, copper. - Size: About 10.00X5.00X5.00cm/3.93X1.97X1.97in. - Ring Terminal Specification: AWG8*5/16,AWG6*5/16,AWG6*3/8,AWG4*5/16,AWG4*3/8. - Heat shrink tube Type: 12MM, 14MM. -Crimping Range: connect wire gauges: 8 AWG, 6 AWG, 4 AWG, 2 AWG, 1 AWG, 1/0 AWG, 2/0 AWG, 3/0 AWG and 4/0 AWG. - Made from iron and steel and copper material, has high strength, hardness and durability. - The lug with spring loaded and only requires a standard hammer and sturdy surface to operate. - Suitable for marine or automotive project, other type of welding cables, suitable for crimping battery cables. - Perfect for crimping battery-cables, welding cables and any other wire crimps for your marine project. - Sturdy grade construction, good strength and durability, impact resistance and aging resistance for reliability. Package list: 1 x Hammer Lug 20 x Crimp Terminals 20 x Heat Shrink Tubes