This is a speed loader for the Smith & Wesson SD 40 and 9mm VE pistols. This is a great tool for loading the magazines easier and faster.
When the rounds start getting too hard to push down place the loader on top of the magazine.
Push down the loader and slide in the next round.
Lift the loader slightly, push in the round to seat it all the way to the back of the magazine and repeat.
This will decrease your loading time and save your thumbs.