The Mag Jig from Magswitch brings you magnetic power – that you can turn on and off – to hold your jigs in place. It comes in both 20 and 30 mm versions, which work on any steel surface, anywhere, giving you flexibility in where you place your jigs. It requires either 30 or 40 mm mounting holes, and can be swapped out to use in various jigs. A manual handle turns the magnetic hold-down force (up to 95 pounds on the 20 mm or 155 pounds on the 30 mm) on or off. The 20 mm sells for $26; the 30 mm for $34.