A must have accessory for hard jawed bench vises is a good set of protective none-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 long wearing yet supple enough to protect finished surfaces. Easy to install & remove, they securely fasten over steel vise jaws with 2 strong magnets. Also, they are V-grooved to aid in holding rounded surfaces. BESSEY. Simply better.