The Norvise Friction Nut was introduced about 15 years ago to extend the versatility of the vise. Typically used to hold the vise in position or to lock the vise when tying, the friction nut has proven to be a versatile piece of equipment for the Norvise. Because you can completely detach the nut from the vise, it is also a part that seems to get lost quite often. Not to worry, if you have lost your Norvise Friction nut, you can order a replacement here