Our 30 series is our most popular all purpose toothbrush style scratch brush designed with a bend for knuckle protection Heavy duty 0 006 brass bristle in a 3 X 7 row configuration with a 7 16 trim and a brush face of 1 3 8 x 1 4 with a strong static neutral plywood handle makes a great tool that can be used for a wide variety of applications including general light scrubbing paint removal board rework and cleanup Specifications . Row 3 x 7. Fill Material Brass. Handle Material Wood. Handle Length 7 3 4 . Handle Width 7 16 . Bristle Diameter 0 006 . Trim Length 7 16