GRS® Tools Burnishing Tool 022-346. This special tool is made from solid tungsten carbide. It is used for burnishing settings such as rub-over or''Gypsy'' stone setting. (2.35mm) square X 1.9? GRS® Tools Burnishing Tool 022-346 This special tool is made from solid tungsten carbide.We stock the full GRS® range! This item is in the category "Crafts\Beads & Jewelry Making\Beading & Jewelry Making Tools\Jewelry Making Tool Sets". The seller is "hswalsh" and is located in this country: GB. This item can be shipped worldwide.