Fast Alternate To Checkering
Create a no-slip gripping surface on a stock, forend or handgun
grip in far less time than it takes to lay out and checker an area.
Sharply pointed cutting diamonds in 12, 16 or 20 lines per inch let
you choose from coarse, medium or fine patterns.
Big Book Catalog, Issue:66, Page:434
SPECS: Steel, blued. 3/8" (9.5mm) diameter. 5" (12.7cm)