ALLWAY HM1 1 GALLON PAINT MIXER ( OLD PM1 ) ALLWAY HM1 1 GALLON PAINT MIXER ( OLD PM1 ) 1 Gal. Helix Paint Mixer, 1/card  HM1 Compatible with all electric drills. Mixes most viscous fluids . Easy to clean. Polypropylene blade with H/D 1/4 hex shaft, carded