This double-ended applicator brush has anti-static horse hair bristle. One end has a flat trim and the other end has an extra-stiff chiseled trim. The handle is made of lightweight zinc-plated steel. This brush is manufactured using strong mechanical clamping for maximum fiber retention, and is adhesive-free to prevent contamination on surface areas caused by leaching. This brush is a great alternative to hand-trimming acid brushes. For other brush size options within this series using horse hair bristle, see part: 1010HH-1/2