3 pc set of stainless steel brushes fitted with a 1 4 hex shaft for use with included standard 1 4 driver handle The 9 long reach is ideal for cleaning tubes ports bearings and other deep hole applications Features . Durable and abrasive bore brushes. Innovative long reach design. Use on ports tubes bearings and other common wire brush applications. 9 overall length easily accesses hard to reach areas. Push Pull only Do not exceed 600 rpm. 3 Piece Specifications . Size 9 in