1 Box H & S Autoshot Uni-Spotter Universal Welding Studs Flexpert # 1001 2.2MM 500 Pcs Autobody shop The Uni-Spotter 1001 Flexpert Welding Studs are the most popular stud sold. They are 2.2 mm, copper coated and have been specially designed for easy welding and easy removal after the pulling is complete. The shafts are strong yet flexible. This is the preferred stud for use with slide hammers. 2.2mm for regular sheet metal damage. Special 5-process alloy for super flexibility. For hard to reach areas and compound pulls, 500 lbs fusion strength with 1,500 lbs tensile strength (773) 386-4806 (773) 225-5979 https://www.5startools.com/tools-1/uni-spotter-universal-welding-studs-flexpert- 1001-2-2mm-500-pcs