Too small for easy handling, the tip has no 'point' and the blades aren't particularly sharp. As a result, nothing prevented him from wandering during rotation. I spent 20 minutes trying to break the circuit on the circuit board with this thing before putting it aside and getting a 4mm drill bit which did the job in seconds. I really wanted a specialized tool that would get the job done faster than I could hold a small drill, what I have now is utterly useless: it doesn't serve its main…