Threaded Adaptor Compatible Table Hole Size 5/8 in Compatible With Buildpro Welding Table Features (2) Threaded Holes with One Magnet Convert Any Hole into a Threaded Hole Includes Magnet Product Type Threaded Adapter Thread Size 5/16 In.-18 Work Surface Pattern (2) 5/16 in-18 Threaded Hole Magnet for Mounting