18Bead Roller Kit - Features and Benefits: 18Throat depth 18gauge capacity mild steel 1/2steel construction Includes 6 sets of dies - 1/4, 3/8and 1/2bead roll, 1/16, 1/8and 1/4step dies Clamp to a bench or mount in a Vise. optional floor stand available 18 in. Includes dies for creating beads in sheet metal as well as step dies which allow you to make a flange on the end of a piece to allow mating of 2 panels together. 18 gauge capacity. Add strength to your sheet metal by adding a bead. Great for firewall, floor pans and trunk decks.