Quality materials: these bore brushes are made of stainless steel，strong and durable, which can clean rust and detail completely; Twisted wire is for increased cleaning action, durable and abrasive Multi specifications: there are 6 different sizes of twisted wire stainless steel bore brushes,to be mounted on any power drill or die grinder (not included) Practical design: the wire cleaning brush is designed for easy access into narrow holes and confined areas, can be applied for ports, tubes, bearings, cylinders Easy to use: you just need paste one of the brushes on the included handle to bore out rust or dirt, and it can also use on any power drill or die grinder Package contains: you will get 6 pieces stainless steel bore brushes with handle, enough quantity and various sizes can meet your different needs