Need to load lots of 9mm into your Smith & Wesson M&P double stack magazine? Are you finding it hard to do? Have a sore thumb from do it? Give the Speed Beez Lever Loader a try. Easy to learn how insert the magazine into the loader it locks in and releases the same way as it does in your Smith & Wesson. Next drop a round into the hole (case first), using a scissors motion will load the round into the magazine. Just repeat until your mags are full. The lever loader give you the mechanical advantage you're looking for, for your S&W mags.