Battery Master Disconnect Switch SPST Lever operated 6-36VDC 180A Continuous-Duty, 1000A in Rush 2 copper alloy stud terminals Individually sealed contacts Large die-cast lever for easier operation One piece die-cast housing sealed with O-rings at base and mounting stem protects against dust and moisture Mounting stem: 3/8\" Diameter, 1/2\" Long with 2 hex nuts and lock washers Fits panels up to 1/4\" thick 765221 Designed for 12VDC vehicles to disconnect all circuitry. Reduces possibility of theft or accidental electrical fires and tampering. For battery circuits only. Does not disconnect from alternator or generator field circuit. For vehicles equipped with alternators, engines must be shut off to avoid potential damage to alternator diodes Face Plate for Battery Master Disconnect Switch 765220 Face plate for use with 765221. Polished aluminum with black letters (OFF ON). Overall diameter = 2.5\", Hole diameter = 0.76\", Thickness = 0.032\"