That's nonsense! First, let me say that I rarely write negative reviews. This hole saw was so bad I just had to warn others. This thing breaks in the first few seconds of use. The pins that attach the hole saw to the chuck broke almost immediately, rendering it unusable. I tried to put the pins back in, but because they snapped it held, so it started to bend. I couldn't finish my project because of this piece of junk. I am returning this item.