A Taller Cap plus a Longer Stroke = More POWER. In a nut shell that TALLER CAP differentiates these staplers from their slightly shorter counterparts. Generally, the standard Omer cap is sufficient in power for normal demands, but sometimes a batch of Medium Density Fiberboard or a run of extra densely grained wood, screams for MORE power. These tools with an “A” suffix to their model code, indicate that extra “oomph” that can make all the difference in some applications. These Omer brad tools are designed and manufactured entirely in Italy and thereby infused with quality and attention to detail. In addition to their normal Sequential trigger, do review our firing mode section to see Bump Fire and Remote Fire Trigger options.