Turn your Wonder Junior Hand Mill into a drill powered grain mill with the Drill Bit Adapter. Simply remove the handle, attach the bit to your drill, slide bit over the end of the shaft, hold it snug, and let the drill do all the work.This is a great alternative to motorizing your Wonder Junior. You may already have a heavy duty drill that will work. If not you can buy a heavy duty drill and this attachment for much less than a motorizing pulley and a motorizing setup, plus you can use the drill for more than your grain mill.Manufacturer recommends using a variable speed drill so that you can keep the speed low to prevent prematurely wearing out grain mill and making a mess. The manufacturer recommends that your speed should not exceed 160 RPM, about twice as fast as you can crank it by hand.This MAY VOID YOUR WARRANTY. Check with the manufacturer of your mill.