1Function: This terminal block helps organize and clean up messy wiring, also reinforced Pc insulated cover and nylon nut connection to prevent accidental shorts. 2Stable Performance: Terminal threaded fasteners use stainless steel split and ring lock washers, which can be stable in high vibration environments. 3Advantages: Nickel plated brass bus bar contact plate has low resistance, great electrical conductivity, high temperature resistance, wear resistance, and safer use. 4Wide Application: Widely used in cars, trailers, RVs, motorcycles, recreational vehicles, trucks, caravans, yachts, boats, ships etc. 5Features: Transparent shell is fireproof and dustproof. Environmentally friendly flame retardant nylon base has the excellent mechanical strength. Stainless steel studs and screws are rust proof.