Doctor Who Sonic Screwdriver Washing Brush - Dr Who Cleaning Kitchen Tool w/ Handle - 7.5 inch In Doctor Who, the Time Lord''s remarkable Sonic Screwdriver can do just about anything, but did you know it can wash your dishes? Check it out. The Doctor Who Sonic Screwdriver Washing Brush looks like a Sonic Screwdriver but it''s actually a brush! Measures about 7 1/2-inches long. Ages 14 and up.