‍Use the 1/4 in. x 11 in. Steel Power Mixer with a 1/2 in. drill to mix and fold compound material without lumping. Use with a 1/4 in., 3/8 in. or 1/2 in. drill with a motor with at least 6 amps that delivers fewer than 800 RPM. Mixes and folds compound material without lumping, If water is present on the top of the compound, mix the compound at a slow speed until the water is blended and the compound is smooth. Dispersal wheels mix drywall mud quickly. Lower wheel cuts upward and the upper wheel cuts downward to create counter flow that quickly disperses lumps.