Designed with state of the art computer technology, these Blue Sliders replace the older black version. Made of durable plastic, these sliders are contoured to fit your pot, thus distributing pressure more evenly. The pad is soft enough to avoid marking your bisque ware, but strong enough to endure years of extended use. They can be used with the pad contacting the pot, or reversed for use with any of the 5 sizes of rods. Comes with the purchase of a Giffin Grip Model 10 and are designed to work with the plates and the rods of any Giffin Grip made within the last 20 years.