Yost Vises MA-350 5 Magnetic Aluminum Vise Jaw Caps (1 Pair) Jaw caps attach to and cover a set of 5"-wide serrated vise jaws to shield delicate work from damage Aluminum provides durability, and the smooth grooved surface provides enhanced grip while preventing the clamped item from being marred Magnetic backing runs the full length of the cap to securely bond it to the vise jaw