HIGH PRECISION JAW DESIGN Crimper with high precision jaw ensures a tight connection after crimping with strong work pressure. This tool has a wide application for automatic electronics work. ROTATE CRIMP DIES The professional cable terminal crimping tool has 6mm /10mm 16mm /25mm /35mm /50mm (Similar to AWG 8, 6, 4, 2, 1/0) wire size crimping, using rotating heads with a spring loaded locking pin to keep the heads in place. 11 SIZES COPPER LUGS 11 kind of sizes heavy duty copper wire lugs (AWG 12-10, 8, 6, 4, 2) are provided. All ring terminals are made of 99.9% copper to achieve maximum conductivity. EASY OPERATION The handle of the wire crimper is long for 10 inches and wrapped with soft rubber, ergonomic lever structure design can increase friction and help you use less effort when crimping.