Other people are saying, but it is difficult to balance the rotation until it gets caught. At the moment the hole opened, the panel got messed up by "big runaway" (Lolly, the size to empty often is Holsau, rarely open size is this, I think that it is good to use it properly.
It is used to drill the chassis of the vacuum tube amp.
On 2010-01-20 18:51:45
It is very convenient to be able to open holes of various sizes with this one. I can not punch holes well if I can not get it. I do not want to scatter chips. Still, this is the best because it can be done quicker and cleaner than doing with other tools.