This spring powered nutcracker is a breeze to use. Pull the spring back, let go and nuts crack with ease. Go ahead, play with your food! This 4.25" tall clever nutcracker will be the conversation starter of the century! The nut shells are contained in within the springs, so there's no mess. It's quite effective - you have to try it to believe it. A great hostess gift and a must have for that gadget lover!