Set of 9 metal stamping punches, each piece has a number on one end. Includes the numbers 0-8 (the number 9 can be created by inverting the number 6). Each number is approximately 3mm tall (with varying widths depending on number). Actual stamping rods are 6mm x 6mm. Comes in a blue plastic storage case, as pictured. These handy tools can be pressed into sheet metal to produce unique stamped jewellery. To use, place your blank on a hard metal surface, then place the punch face down on your blank, and tap the end in one solid hit with a hammer. We recommend practicing beforehand. Note for postage that this set is quite heavy.