Absolutely brilliant 33

I had already tried several tools of this kind, for a still very disappointing, very unclear and in addition very laborious.
This one is really well designed and very easy to use. He clamps along drill guide. In fact everything is perfectly in place (the guide and boards). And there is almost no need to think. It goes very quickly. And the result is perfect.

An important tip: as is the two series of holes at the same time, usually not of the same depth, provide two sets of drills with earthed, not having to redo the settings of earthed between each hole!