This master disconnect switch is a single pole battery disconnect with two positions: off-on. It is rated 12V DC; 20A continuous; 125A intermittent 15 seconds on, 5 minutes off (UL rating). It has two 3/8" copper stud terminals and die cast lever actuator. The mounting stem is brass, 3/4"-16 thread, 23/32" long, and will fit panels through 3/16" thick. The case is plated steel.