Lot of ten stainless steel power tube brushes for general deburring and cleaning operations. Brush diameter is 1/2 inch x 3/4 in long and overall length is 3 1/2 inches. Bristles are .005 in stainless steel, single spiral. Stem is 1/8 in electro-galvanized steel. These are top industrial quality brushes made in USA. These brushes available in the following sizes: 1/4, 3/8, 1/2, and 3/4 in. diameter.