This is the answer if you are looking for an upgraded cyclic SPEED for truly rapid "AUTO-FIRE" as well as extra power to drive the 18 gauge staples into dense materials. But it offers more than high SPEED alone. Precision made by Omer to provide a carefully planned and consistent rate of fire. For some applications it is nice to Drive Wide Open at top speed but there are also requirements for a slower rate of fire. Plus, Omer's refined design dia...ls up and STAYS set at the automatic speed desired. Kept instantly in reserve right at your finger tip, is the ability to OVER RIDE the automatic setting. This provides the option of careful single staple placement. The best of all worlds.