This hybrid, dual trim brush has bristles that are longer on the outer edge of the brush, allowing the operator to splay the bristles into corners and sides of the glass. The shorter, inner bristles remain upright and allow the tip of the bristle fiber to continue scrubbing directly on inner surface of the glass. This brush comes with 2 individually plumbed pencil jets, which help direct a high-pressure stream of water that assists the brush operator by blasting away stubborn dirt. Made in USA.