Magswitch on/off magnetic MagJig150 with 150lb/67kg of vertical holding force. MagJigs are the Ultimate Workholding Clamp. Nothing else like it ever! Incredible hold force in a simple 180 turn! Unmatched speed, strength and precision in clamping, Magswitch MagJig Magnetic Clamps have revolutionized table top workholding in woodworking and industrial fixtures. 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 hole using a 40mm Forstner bit (sold separately) into thick material. Drill as many holes as you want for as much strength and flexibility as you need by simply dropping in more MagJigs. Featuring the patented Magswitch technology for complete on/off control, super strong , precise positioning.