Tool kit: a professional cable crimper for use on copper terminals and cable only Steady: high quality carbon steel offers long service life Durable: Precise crimping molds and complete locking with self-locking & releasing design to ensure quality. Easy to operate: Hexagonal rotating dies processed with wire EDM cutting, more accurate than normal casting dies. With individual settings from 6mm² /10mm² /16mm² /25mm² /35mm² /50mm² ( Similar to AWG 8/6/4/2/1/1/0) Safety: anti-slip handle design. Do Not close jaws until the terminal is corrcetly positioned.