4 Inch Long Bristle Yellow Medium Scrub Brush Fits Electric Drill Medium long bristle power scrub brush, DRILL NOT INCLUDED Long medium bristles won't scratch tub, tile, and porcelain surfaces. Made in the U.S.A. quarter inch quick change shaft fits all cordless drills and imact drivers Extra long bristles reach into contours, around fixtures, and in to shower door tracks All Drillbrush Products have a 90 day no questions asked Money back Guarantee. If you are not completely satisfied with our product we will issue a full refund or ship out a replacement at the buyer's request. Cordless Drill NOT included.