90 Degree 12.7mm(1/2″) Hem roll step #1 Bead Roller Dies Set Bead Roller Hem Rolls Dies create a hem in a edge of sheet metal panels to create a stronger,safer, and overall, more professional appearance. Hem Rolls have an integrated guide to keep the edge consistent. Description • Black oxide coating to avoid rust and for long life. • Fits Most Bead Rollers with 22mm shafts • 1st Step of 3 roll process for creating a hem in a edge of sheet metal Creates a 90 degree angle, 1/2″ Finished Flange Width • Packing Dimension(cm): 15x10x6 • N.W./G.W.(kg):9.5/1