Number set. Character height 1/4 in, shank length 3 in, shank size square 7/16 in, material steel, Rockwell C 57 to 59 at the character end and 49 to 53 at the striking end, case material plastic, indication character and size are marked on thumb side.
Technical Specs
ItemNumber Set
Shank Length3"
MaterialSteel
Case MaterialPlastic
StandardsFederal Specification GGG-D-280C
Character Height1/4"
Shank Size Square7/16"
Hardness58 to 62 HRC at the Engraving End and 38 to 46 HRC at the Striking End