To use it, simply place a 4 oz stick of butter into the cylinder, snap a couple of parts into place and twist the cylinder counterclockwise to press the butter against the grating disk. The cylinder also serves as the storage compartment for the butter so after you finish using it, simply snap the cap back over the grating disk and place the Butter Mill back in your fridge until you are ready to use it again. No need to wash it immediately after each use. The Cooks Innovations Butter Mill works better, simpler, and has more functionality than messy, mold-prone butter bells, butter cutters or treacherous open shaving or grating systems.
The grating disk is stainless steel. The rest of the unit is made of BPA-free plastic. The SM1520 model includes a designer-look stainless steel “skin” around the clear plastic Butter Mill chamber