This depth setter is more advanced than it looks. It has an internal mechanism that automatically disengages the bit from the power tool’s drive when the stop collar meets the work surface. This not only prevents overdriving the screw but also protects the bit and the screw head from becoming stripped.
The screw depth setting is adjustable for up to 3/16" of countersink and the free-spinning collar has a rubber O-ring edge to prevent marring of the work surface.
The depth setter has a 1/4" hex shank drive. While the 1/4" hex socket accepts any 1" hex-shank bit, the tool comes with a #2 Phillips bit, three T-20 Torx bits and a T-25 Torx bit. Not for use with impact drills.