Heavy Duty (Continuous) Cable Clamp Set. For ease of cable installation, there is a brass-crimping lug that securely bolts to the clamp. This provides options for cable size being used and ease of installation. Secure the wire firmly with a crimp lug for wire sizes of 6ga,4ga,2ga, 1/0ga. The heavey duty booster clamps are ideal for heavy-duty battery chargers, jump starters, or use with 1/0-2/0 booster cable assemblies. Our professional grade clamps have a PVC over molding applied to the outer surfaces to protect unexpected arcing with metal contact. The molded grips act as insulators and are rated up to 70°C (158°F).