This robust spade is made from copper and is nickel-plated, giving it high conductivity and resistance to corrosion and oxidation. It features a screw locking system and accepts cable diameters up to Ø4mm. The spade's contacts are 8mm apart, and tighten to 6mm. Total body length is 40mm. This spade is perfect for a DIY audio cable project, for a connection between an amplifier and speakers for example..