Pryor Premium Punches – Letter & Figure sets Harp Faced engraving style to produce clear positive impressions 11 Character sizes Letter Sets of 27 Stamps (A-Z,&) Figure Sets of 10 Stamps (0-9 Best quality steel hand stamps made from chromium tool steel. All the stamps in this range are through hardened to between 58-62 Rockwell C and then tempered at the striking end to between 32-40 Rockwell C giving maximum safety in use When you look at the engraved character on a standard hand stamp, the letter is a reflection /reverse of how it is indented. An example of this is shown in the image ribbon. Manufactured under stringent BS EN ISO 9001:2008 quality controls and exacting standards.