60 New Stiff & Soft End Brushes This new set of 60 stiff end brushes. These are great for polishing and finishing all sorts of metals. All have a 3/16" (5 mm) diameter ferrule mounted on a 3/32" (2.5 mm) diameter shank. The brushes with stiff bristles are perfect for cleaning, while the brushes with soft bristles are great for fine polishing. You receive: 12 Stiff brushes that each measure approximately 1/4" (6.5 mm) in diameter 12 Soft brushes that each measure approximately 1/4" (6.5 mm) in diameter 12 Stiff brushes that each measure approximately 3/8" (9.5 mm) in diameter 12 Soft brushes that each measure approximately 3/8" (9.5 mm) in diameter 12 Stiff brushes that each measure approximately 1/2" (13 mm) in diameter