Suitable for a variety of uses including internal/external thread cleaning, cleaning drilled holes and cleaning small bore holes etc. Set comprises six nylon brushes, six stainless steel brushes, six brass brushes, soft grip magnetic handle and a 150mm magnetic extension. Supplied with canvas fold up case. Features and BenefitsSuitable for a variety of uses including internal/external thread cleaning, cleaning drilled holes and cleaning small bore holes etc6 x nylon, brass and steel brushes: 9, 11, 13, 15, 17, 19mm dia. and 150mm extensionSupplied with canvas fold up case Contents 6 x Nylon, brass and steel brushes: 9, 11, 13, 15, 17, 19mm dia 1 x Extension, 150mm