Can be used as a stand alone unit, or locked together with other switches. Features a control knob which cannot be removed while in the ON or OFF position, but it can be removed by switching to an anti-clockwise 45° position. Also features removable side plates on 4 sides for access of up to 1/0 cables plus a rear cover insulating the rear terminals against any short circuits.Specifications: Continuous Rating: 275 Amps DCIntermittent Rating: 455 Amps DCCranking Rating: 1250 Amps DCVoltage Rating: 48 Volts DCOperation: On/OffRecessed or Surface MountIgnition ProtectedTermination Stud Size: 3/8" (2 x 10mm)Dimensions: 2.75" x 2.75" x 3"H (69 x 69 x 75mm H)Tin plated copper studs and nuts