The advanced helix design improves mixing performance by maximizing beater overlap & mixing ingredients in multiple directions. The BLACK+DECKER Helix Performance Premium Hand Mixer w/2x the surface area & 2x the mixing performance Plus a special turbo boost adds a power boost at every mixing speed to combine thick ingredients in no time. All accessories are stored conveniently in the smartly designed storage case which uses the mixer itself as the snap-on cover. Cleanup is a breeze w/the auto-eject button that quickly disconnects the dishwasher-safe mixing tools. Plus you can further prevent messes w/the heel & bowl rest which allows the mixer to sit upright on the edge of the bowl compared to BLACK+DECKER model MX3200B.