Battery ClampExcellent electrical and physical properties. Hammer-on copper connection. Heavy duty tension spring gives positive connection on front and side. Vinyl insulation that is highly resistant to oil, acid, abrasion, chemicals and ozone. Color coded. Amps: 600.00 A [Max]; Cable/Wire Size: 1 AWG [Min], 3 /0 AWG [Max]; Color: Black; Jaw Material: Steel; Jaw Opening: 1 in [Max]; Style: Standard; Weight: 8 oz.