FHP-1 is a universal in-line fuseholder with a bayonet knob for use with glass fuses. The FHP-1 is constructed with tough black thermoset (UL94V0) and includes three springs for various fuse sizes and a spring-locked, bayonet type knob. Comes with a 15-inch loop of 14 gauge wire. The FHP-1 is for use with glass SFE 7 1/2, 9, 14, 20, AGA, AGC, AGW, AGX fuses up to 20 amps when the proper spring is installed.