Burr-Rx Wheel Brush, Small Diameter, 1-1/4 in Brush Dia, 5/16 in Face W, 1/4 in Arbor Hole, Crimped/
022 in Filament/Wire Diameter, Nylon/Silicon Carbide Fill, 5/16 in Trim Length, 10000 rpm Maximum, Unthreaded Arbor Attachment..Small diameter Burr-Rx wheels feature Weiler advanced black ceramic grain filament which delivers up to a 400% greater edge cutting action in comparison to traditional silicon carbide and aluminum oxide filaments for the fastest, most aggressive deburring action for minimum cycle times and maximum media life.