Some of my cabinet and furniture building projects are either too large for my drill press where I can set the drilling depth or I am in the process of installation where only a portable drill can be used to drill holes to a precise depth. I buy and build my drill stops to match the exact diameter of the drills being used so the drill stop does not “wobble” and scratch the surface (also use a paper washer). Also, the setscrew cross holes are threaded on both sides of the stop because over time these threads wear out due to over-tightening and the second hole provides a back-up. These drill stops are particularly handy for preventing drilling through into a finished surface of a beautiful cabinet. The plastic container illustrates the commercially available drill stops.