The Ultimate Workholding Clamp. Theres nothing else like it – ever! 60 pounds of holding force in a simple 180 degree turn of a knob for unmatched speed, strength, and precision in clamping. The Magswitch MagJig Magnetic clamps have revolutionized table top workholding. Features fast, strong set up anywhere on a steel or cast iron table or fence. Not limited by the miter slot or table edge. Use in your custom jigs and fixtures by drilling a 50mm hole using a Forstner bit into standard 3/4" stock. Drill as many holes as you want for as much strength and flexibility as you need by simply dropping in MagJigs. We recommend use of two per fixture to avoid pivot.