CAT# DESCRIPTION PRICE QTY. 530 3/4in dia.; Wheel Shape 1/8 Inch Shank Stainless Steel Brushes: Stainless steel brushes do not cause "after rust" when used on stainless steel or other corrosive-resistent materials. Use it on pewter, aluminum, stainless steel and other metals. Do not run in excess of 15,000 RPM. $3.12 531 1/2in dia.; Cup Shape 1/8 Inch Shank Stainless Steel Brushes: Stainless steel brushes do not cause "after rust" when used on stainless steel or other corrosive-resistent materials. Use it on pewter, aluminum, stainless steel and other metals. Do not run in excess of 15,000 RPM. $3.12 532 1/8in dia.; End Shape 1/8 Inch Shank Stainless Steel Brushes: Stainless steel brushes do not cause "after rust" when used on stainless steel or other corrosive-resistent materials. Use it on pewter, aluminum, stainless steel and other metals. Do not run in excess of 15,000 RPM. $3.12 536 1/2in dia.; Cup Shape 1/8 Inch Shank Brass Brush: Brass brushes are non-sparking and softer than steel, so they will not scratch softer metals. Use on gold, copper, brass and other precious metals. Do not run in excess of 15,000 RPM. $3.12 535 3/4in dia.; Wheel Shape 1/8 Inch Shank Brass Brush: Brass brushes are non-sparking and softer than steel, so they will not scratch softer metals. Use on gold, copper, brass and other precious metals. Do not run in excess of 15,000 RPM. $3.12 537 1/8in dia.; End Shape 1/8 Inch Shank Brass Brush: Brass brushes are non-sparking and softer than steel, so they will not scratch softer metals. Use on gold, copper, brass and other precious metals. Do not run in excess of 15,000 RPM. $3.12