Tired of dropping tiny screws because your screwdriver bit won't hold them? These little magnetizer rings are a lifesaver. You get two in a pack. They're made of blue ABS plastic with a metal ring inside. To magnetize a standard 6.35mm (1/4 inch) screwdriver bit, just slide the bit through the hole – instant magnetism that'll hold screws securely. If you need to demagnetize it (for working near electronics, for example), you place the bit in the outer notch. They're small, lightweight, and you can keep one in your toolbox, one in your pocket. No batteries, no fuss. Makes DIY jobs, electronics repair, or assembly work so much easier and less frustrating. A must-have for any home toolkit. Just remember, they only work on bits with the right shank size, and the bit itself needs to be made of a magnetizable metal.