Battery Doctor Key Operated Waterproof Battery Disconnect Switch 20314 19-0781

100 amp continuous, 1000 amp surge at 12 volt; 50 amp continuous, 500 amp surge at 24 volt. 2-1/4 inch diameter x 2-1/2 inch depth. It has two 3/16 inch diameter mounting holes, waterproof cover & 2 keys. Excellent for marine & auto use.