the question came up. how do a make a drill stop so I don' drill threw my headliner. will you can make one out of a piece of 1/2 PVC. but how to keep it on the drill bit? simple solution is a piece of cardboard box. just cut a small square and force it over the bit. it will cut into the cardboard and keep the pipe from falling off it will also cushion the pipe on the top so you don't scratch it as the bit spins. it stayed on through these 8 holes.
