The Depth Stop works with an integral clutch that maintains the preset depth. This means the screw depth isn’t controlled by a torque control, so all screws will be set to the same depth. Here's something no other depth activated screw gun can do: With the Quick-out” ring, screws can be removed with the flick of a wrist. Converts your Festool cordless drill in seconds for accurate depth setting in drywall, decks, fences or other where depth control is important. Bit changes are fast and easy. Uses standard 1" WIRE DETENT (INSERT TYPE) BITS. The Depth Stop can be used with all Festool cordless drills and fits perfect into the FastFix chuck family.