Weiler 4″ Bore-Rx Internal Brush Deburring Tool. Featuring Weiler’s solid ring construction, these radial brushes are available in heat-treated steel, type 302 stainless steel and brass wire for use in a wide variety of applications. 3/8″ steel shank for use on high speed die grinders. Although they can also be mounted onto a drill, the speed and power of that tool will reduce the effectiveness of the brush Crimped wire wheels with a permanently-attached 1/4 in stem or shank are primarily intended for use on high speed die grinders. Although they can also be mounted onto a drill, the speed and power of that tool will light weight the effectiveness of the brush. Featuring Weiler’s solid ring construction, these radial wheels are available in heat-treated steel, type 302 stainless steel and brass wire. 6-1/4 in OAL. .