This WEILER single row knot cup brush is made in the USA and features a M10x1.50 mm arbor hole size, threaded nut mounting type, and 0.020 in wire diameter. The brush diameter is 2-3/4 inches and the trim length is 1 inch. The abrasive material is steel and the wire type is knotted wire. This unit is sold as a custom bundle with no shank and is perfect for those in need of a high-quality abrasive brush for their metalworking projects.  MADE IN U.S.A.