I've had many of these bits, they only last so long before they bend. They feed well (very important), and the hole is clean cut. It is still better than some of the old school bits out there. Unfortunately I only get maybe three or four frames before having to get a new one. Not cool. For me the feeder is most important, because some old school bits bog down and won't feed without constantly cleaning the threaded tip, which is often just not worth it when you have a couple hundred holes to drill. Also I learned the hard way that it comes with our without spurs. Without spurs is useless, very messy hole on the face of wood.
Rating: [4 of 5 Stars!]