20pc Wire Brush Set A comprehensive wire brush set for numerous automotive uses including removing and cleaning carbon deposits from internal/external threads, pipes and drilled holes. For use with any power drill or hand use. Sizes: 9, 11, 13, 15, 17, 19mm 6pc Nylon Brush Set 1/4in Shank 6pc Brass Brush Set 1/4in Shank 6pc Stainless Steel Brush Set 1/4in Shank Soft grip handle for hand use 150mm extension with Quick Chuck for power tool use Canvas storage case