These are the top of the line, ultra-fine Hard Arkansas Stones
made by Norton and used by professional gunsmiths, pattern
makers, wood workers - anyone who wants a super-smooth finish
on cutting tools, gouges; for accurizing, trigger work, hard fitting,
etc. The "Premium" designation means these stones are made
from selected, finest quality, hard, Ozark Quartz. They show the
minimum in variations within each stone and are carefully checked
for consistent hardness. A must for truly precision parts fitting and
sharpening.
SPECS: Ship Wt.1/2 lb. *As with all natural products, sizes
shown are nominal and may vary. METRIC: 1"=
2.5cm.
Catalog page 450, 487