Allstar 5/8 inch Mounting Hole Weld-On Style Brake Line Adapter Mounting Tab (Pack of 4) is a weld-on style and has a 5/8 inch mounting hole. It is designed to secure the Allstar brake line adapters part 50100 through 50103. It is sold as one set of 4 pieces. It is backed by a 90-day limited factory warranty.