Hollywood Impact Kwik-Release Double First Base will disengage when hit with enough impact, greatly reducing the risk of injury. The orange base remains in the ground, to allow play to continue. A waffle bottom design gives it plenty of strength and flexibility. The soft rubber nubs on top hold onto the top portion of the base but are soft enough for players to slide over without injury. Dimensions: 15" x 15" x 2 3/4".