Easily insert self-piercing rivetStecks new SPR Insertion Tool is a high-grade, hardened steel frame, that uses a 1/2 Inch 20 grade 8 hex bolt, with a magnetic end and center recess to hold the replacement SPR, while inserting it with your 3/4 Inch or 19 Millimeter socket using your 1/2 Inch impact wrenchMade in USAEasily insert self-piercing rivetSteck’s new SPR Insertion Tool is a high-grade, hardened steel frame, that uses a 1/2 Inch 20 grade 8 hex bolt, with a magnetic end and center recess to hold the replacement SPR, while inserting it with your 3/4 Inch or 19 Millimeter socket using your 1/2 Inch impact wrenchMade in USA