The Gordon Brush 221SSN is a double-headed scratch brush with two brush faces on a triangular head. The black plastic handle features hand grips for improved comfort and control. One brush face is filled with 0.006" stainless steel bristle and the other 0.016" Nylon bristle. Both sides have a 3 X 7-row configuration, with 7/16" trim, and a brush face of 1-3/8" x 5/16". Overall brush is 7-1/4" long and 2-1/8" wide at the brush head. Ideal for gently cleaning keyboards and narrow areas.