Waste of money. Absolute rubbish. Look elsewhere because this piece of metal is the most expensive piece of metal you will ever spend money on. The first one I bought broke so I figured I might have pressed it too hard and adjusted it. I said ok I'll be very conservative and take it easy, the second one broke even after limited use. So I said forget it and bought FIVE Chinese bits for a third of the price and they worked great. I figured, hell, let's give the old American Aman a third chance, with the same speed and settings as a Chinese drill with the same specs. Guess what? yes it crashed So now they owe me +/- $190 not counting wasted time. Buy Chinese beats and you'll thank me for it. FIVE for less than $30. MADE WITH AMANA.