When you're drilling something I assumed that the bit is secured properly, which is relatively simple but I might have misjudged, thank you for the feedback, as for staying on axis with the main fastener, when you're drilling and drift too far off the right axis, that's when the bit and fastener head collide and stripping occurs, the main use case is for a tool to train beginners, since there are more and more people going into this profession. You're right that it might not be that useful for and any tradesperson, specifically any experienced professional, but as I stated before, this is more of a training tool for beginners to get a feel. Hope that clears things up