6 Piece Hollow Punch Set with Hex Shanks, Non-Slip Fit, Sizes: 3/16", 1/4", 5/16", 3/8", 7/16", 1/2" Affordable way to get great precision holes in leather or heavy, thick fabrics Hex shanks for secure, non-slip fit in any chuck Sizes: 3/16", 1/4", 5/16", 3/8", 7/16", 1/2" Overall length: 2-3/4" Weight: 0.35 lbs.