Bristle Mounted End Brush Soft 3/8" Ferrule X 3/16" Trim, 3/32" Mandrel Box of 12 Orders over $100.00 are usually shipped within 24 hrs of receipt (excluding weekends). The estimated delivery dates showing on Amazon are usually delivered much sooner than the dates shown. Fine quality mounted and unmounted brushes in a variety of sizes, textures and materials for any polishing or finishing job. Mounted brushes have 3/32" (2.4 mm) diameter shanks. Stiff bristle for cleaning. Soft bristle for fine polishing. Free Shipping!!! Used by Professional Jewelers