Covington vibrating lap 10″ model #392AVL is designed to abrade and polish automatically. The inertia of the heavy rock slab holds it relatively still, while the lap pan vibrates underneath. This action replaces the circular rotation used by conventional lapping machines. The new design and groved plate of the Covington vibrating 10″ lap pan gives faster cutting. A bumper ring prevents gemstone damage. Pad insert enables work piece to be polished in the same pan. One thumb screw releases the pan for easy cleaning. Comes complete with 110v, 60hz motor, polish pad, bumper ring instructions, and guarantee. The lap pan size is 10″, box dimension is 12″ x 12″ x 10″. The lap plate and base is cast aluminum and will last for years. Shipping weight 18 pounds. Covington equipment are shipped from Meridian, ID.