A row or two of 3⁄4“-dia. bench dog holes allows you to add all kinds of stops, clamps, and vises to your worksurface. While you can simply drill a hole anywhere, I like to space them consistently across the length of the bench. Using a jig you see here does the trick. Another advantage is that the thick plywood guides help you keep the bit perpendicular to the surface. The guide is just a piece of plywood with two sets of guide holes. I drilled these at the drill press to make sure..