L.H. Dottie MegaPro® D131R 13 in 1 Ratcheting Screwdriver. The D131R is a 13 in 1 Ratcheting Screwdriver that has a precision 28 tooth ratchet capable of delivering over 225lbs of torque strength making fastener installations quick and easy. It also comes with a convenient patented retractable bit cartridge that is loaded with six double-ended bits for a total of twelve different standard sized drivers and a 1/4'' Hex Drive Shaft, which is ideal for driving 1/4'' Hex Head Screws.