Taper clearance. Polished barrel, hardened and polished edge. Used extensively by leather bag and strap manufacturers

Lengths: ¼”, 3/8”, ½”, 5/8”, ¾”, 7/8”(OSB 151A)
1” (OSB 151B), 1 1/8” (OSB 151C), 1 ¼” (OSB 151D), 1 3/8” (OSB 151E), 1 ½” & 1 5/8” (OSB 151F), 1 ¾” & 1 7/8” (OSB 151G), 2” (OSB 151H)