Review on General Tools 195 1 Countersink 2 Inch by Muleme Bollinger

Some of these reviewers don't know what they are doing. This type of drill will vibrate unless you're using a power drill (and even then if you're trying to work too fast) it's not the drill's fault. At the very least you need one with a guide, but then look for a full set with one for each hole size. I set the press to the lowest speed and it carved some deep countersinks into the L-track aluminum like it was cheese, leaving a nice, shiny, perfectly round hole for some 3/8" countersunk screws. Drilling normally uses high speed and low pressure on aluminum, but in this case it was just very noisy and hot (the countersink still came out nice and round, but it looked rough with a million tiny cuts instead of a smooth cut). It's HSS so I'm assuming it'll only last for this one project and after a dozen 3/4" holes so far so good. Good value for money. If you do this all the time, get a single flute cobalt set for around $200 or you'll have nothing to complain about.