ESI 304B 20 Amp Fuse Buddy ATC Tester Can test circuit current up to 20 amperes - an easy way to check fuel pump amperage Clever design allows for easy connection into fuse sockets Fuse Buddy ends are molded into the shape of the fuse itself During testing the fuse is removed and replaced into the Fuse Buddy; this way the circuit being tested maintains fuse protection Fuse Buddy stays put and wont fall out of the socket like test probes do