The 90574-1 from TE Connectivity / AMP Brand is a PRO-CRIMPER II Hand Tool Assembly for use with 18 to 24AWG AMP Universal MATE-N-LOK contacts. The tool features a tool frame with a stationary jaw and handle, a moving jaw, a moving handle and an adjustable ratchet that ensures full contact crimping. The tool frame holds a die assembly with three crimping sections.