A valuable accessory for hardened and serrated metal jaw bench vises is a good set of protective non-marring jaws for times when you need to grip a finished surface without damaging it. BESSEY's BV-NVJ nylon vise jaws are hard enough to be durable yet supple enough to protect finished surfaces. Easy to attach and remove, they fasten quickly onto steel vise jaws with 2 magnets. V-grooved to aid in holding irregular or rounded surfaces.