Magnets can be a very useful tool in the shop, especially when trying to machine items like washers. Place the washer on the magnet, then place both the magnet and washer on the front of the chuck jaws and tighten on the washer. Your piece is not only centered, but also square to the centerline of the chuck (granted the magnet has flat sides). A pair of 2" round magnets can be purchased from Harbor Freight for just a couple dollars, but their usefulness is near priceless.
Invaluable Trick!!
Invaluable Trick!!