Made of alloy with good electrical conductivity, comfortable to use. Suitable for all types of instruments, mechanical equipment. Lamps, model, toys etc. Nickel-plated, screwable with hole in the wide side. Total plug length: approx. 4 cm / 1.57 inches, total socket length: approx. 1.26" 5 pairs of crocodile clips with insulated sleeves, thermoplastic rubber covers. Specification: Total plug length: approx. 4 cm / 1.57 inches. Total socket length: approx. 3.2 cm / 1.26 inches. Wire diameter (max. ): approx. 5.5 mm. Material: iron + ABS (acrylonitrile butadiene styrene). Colour: red, black. The package includes: 5 x red sockets. 5 x red plugs. 5 x black sockets 5 x black connectors. 5 pairs of crocodile clips.