Rated at up to 380 amps continuous and 850 amps intermittent. The 90° rotation feature of the knob allows users to feel the switches' position in no light situations and the classic shape of the knob makes it easy to turn. Allows for the use of one or more batteries in systems with one or more engines and facilitate putting batteries in parallel for emergency starting when one or both batteries are substantially discharged. The housing of the heavy duty switches are red fiber-reinforced polycarbonate. Selector switches are designed with a "make before break" feature. This allows switching between the "1", the "ALL" and the "2" positions while the engine is running.