Compatible: with a long bolt, used for side post terminal, battery side post with 3/8 inch hole only, recommended to mount on NEGATIVE battery post, DC 12V-24V system, 200A continuous and 600A momentary at DC 12V, on/off 2 position. Convenience: knife blade type, easy to install & simple to use. Lift , then power cut. Heavy Duty: solid Metal made, rust and , made for safety use. Purpose: used for battery to isolate and secure the electrical system, any power draw from the battery when vehicle or boat is not in use, disconnects the battery safely. Used for side post batteries or other batteries which have a 3/8 inch side post terminal, also used for electrical equipment. Material: Metal colour: Photo Color Package Contents: 2 x Battery Disconnect Switch (With long bolts) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.