This brack was made so i could mount my laptop with the cooler underneath my adjustable desk. issue is a lot of mounts dont have a “spacer” like mount. Due to the metal movement rod underneath the desk, i had to create a gap that allowed everything to be mounted while holding the bulky 17" laptop with the cooler. With mounting, the bracket has a hole big enough for a regular bit extension so you dont have to worry about using a thin bit holder if that is all you have.