Weiler 3/4" Burrite Power Tube Brush is Ideal for cleaning and deburring internal threads on steel parts. 1/8" stem diameter for use on CNC, drills and drill presses. Features a single continuous length of stainless steel stem wire filled with a tuft of crimped wire to provide aggressive flat side action. Weiler offers a comprehensive line of power and hand tube brushes for internal cleaning and deburring applications in tubing, pipe, drilled-and-tapped holes, and machined bores and passages. Due to their twisted-in-wire construction, the use of power tube brushes is limited to low-speed power tools such as drills and drill presses and to CNC and manual machine tools in which the RPM can be precisely programmed or set. In addition, they should not be used in reverse rotation to prevent unraveling of the stem wire. Available in a wide variety of brush configurations and fill materials, Weiler can supply a tube brush for any application