This kit is ideal for the tyer that has a Renzetti vises for yeas. There is a kit for each series vise. For Cam Series vises the kit comes with jaw o-rings, springs, jaw adj. Screws and ball bearings. For NON CAM vises, the kit comes with jaw o-rings, jaw springs, jaw adjusting screw and or rotary tension screw. Choose the kit for your particular vise series. X9004 shown. O-rings is available in a pkg of 5. Vendor: Renzetti