Round base magnet — 65-lb. pull. 2 2/3in. dia. x 3/8in. thick with 1/4in. hole. This magnetic base has a powerful ceramic ring magnet encased in a durable nickel-plated cup with a mounting hole in the center. The extra strong magnet will hold up to 65 pounds and can suspend heavy items such as speakers and spotlights. Under normal use, permanent magnetism guaranteed. Highly resistant to heat. Pulling Power (lbs.): 65, Material: Ceramic ring, Dimensions L x W x H (in.): 2 2/3D x 3/8 thick