Fowler's Hardness Tester File Set is an inexpensive, easy-to-use method for determining material hardness by sliding the file cross the object's surface.
Six color-coded files indicate hardness from 40 to 65 HRC. Conveniently packaged in a leather-like case with a velcro lined flap, the files are approximately .157" in diameter and 7" in length (4.30 x 175mm). |