Professional quality, Chrome Vanadium Steel Perfect for personalizing jewelry and other items Compact size box, won't take up a lot of space Set includes 27 letters (from A - Z) plus the "&" symbol as well as 9 number punches (0 - 8) - use the 6 as a 9 Metal alphabet punches are on a 1/4" (6mm) square shank for use as impact hammer bits Stamps have precise dimensions and clear strokes. The surface is sanded for a smooth finish and packed in a durable plastic case for easy storage.