9 Piece Hollow Punch Set with Knurled Shanks, Chrome Plated, Storage Pouch; Sizes: 3/16", 1/4", 5/16", 3/8", 7/16", 1/2" Punch sizes: 3/32", 1/8", 5/32", 3/16", 1/4", 5/16", 3/8", 7/16", 1/2" Precision ground flutes and cutting edges Carbon steel construction Chrome plated to resist corrosion Knurled shanks