Because the RPM: A higher RPM will tackle larger, thicker cuts more easily.
* Dado Blades: Dado blades are accessories that can be used to cut grooves and rabbets.
** Grooves: A dado groove is a channel, used for fitting two pieces together.
** Rabbet: The rabbet is the adjoining piece, and it fits into the groove.
*.
* Automatic Brake: The automatic brake will stop a blade the second the trigger is released, to maximize safety and minimize downtime.