Round base magnet — 15-lb. pull 1.42in. dia. x .265in. thick with a 3/16in. hole. This magnetic base has a powerful ceramic ring magnet encased in a durable nickel-plated cup with a mounting hole in the center. Add a hook or knob and this magnet is perfect for holding wiring or cords in place. It will hold up to 15 pounds. Highly resistant to heat. Under normal use, permanent magnetism guaranteed. NOTE: Pounds pull is rated by vertical test on 3/8in. thick ground steel plate. Pounds pull rating will be reduced if the item you wish to lift is thinner, painted, or an uneven surface. Pulling Power (lbs.): 15, Material: Ceramic ring encased in durable nickel plated cup, Dimensions L x W x H (in.): 1.42D x .265 thick