FghtinIrshNvrDi said:hardly any. It's one of those 'theoretical' tools. The only application they work on is if you have a drill press. The human hand just has a HECK of a time keeping that thing driving straight. It WORKS, but they're huge PITA tools.
Ryan
Problem is, you try finding a Drill Press that is big enough. Sure, you might have one for side pannels. However you try finding one in a non-industrial environment that will allow you to cut thought the top back of a case.