Number Set Character Height 1/8 in Character Type Set Double Digit Number Set Characters Included 90 to 99 Duty Heavy For Maximum Surface Hardness 50 on A Rockwell C Scale For Shank Diameter 3/8 in Holder Length Not Applicable Holder Shank Size Not Applicable Impression Character Style Gothic Includes (10) 90 to 99 Product Type Hand Stamp Kit Shank Length 2 3/4 in Shank Thickness 3/8 in Shank Width 3/8 in Stamp Material Steel Standards Not Applicable