Magswitch MagJig 150 (Set of 2) w/Magswitch 40mm Forstner Bit On/Off Magnetic clamp with Incredible 150lb/67kg of magnetic hold force Make custom jigs and fixtures by drilling a hole using a Forstner bit into 3/4" thick material Precise positioning anywhere on a steel table or fence. No mitre slot limitation Use with the Magswitch Universal Base as part of the Magswitch Workholding System Includes Magswitch 40mm Forstner Bit