BOX OF 4 LM Disc: is an excellent entry level piece for the LM Series of products. The Discs are round and have a dimple on one side only, designed to match the tip of the Pryamid Cones. They are the most basic element in the LM Series of products and may be the optimal part for smaller or lighter components. A 1.5” diameter dimpled LM Disc is offered as an affordable entry product, and is excellent for basic applications.