4.5", knotted wire wheel, x-lock arbor, carbon steel, full cable, faster, fixed mount & high-quality materials, snap-on wheel mounting & a release lever for change-out that's up to 5x faster, wheel mounts properly without the need for a spanner wrench or flange nuts, no easy to lose parts, features carbon steel with a narrow face for more difficult brushing applications in tight places such as cleaning welds on angles or corners, robust applications for metal designed to be ideal for deburring metal, bead weld prep, cleaning welds & edge blending, precision-balanced wheel virtually eliminates vibration, application focused designed specifically for use with x-lock small angle grinder.