The Mag Ring, made by Jack Rabbit Tool Co., can magnetize any 1/4-inch driver bit, nut driver, hex wrench, or screwdriver. Three neodymium magnets arranged in a ring of brass hold the item in place and transfer the magnets’ force to the bit. According to the manufacturer, the holding power is three times stronger than that of other similar devices. Price: $10 / COO: Taiwan / jackrabbittool.com