Magswitch Universal Base is the centerpiece of the Magswitch Workholding System. All tool attachments are designed to fit the Universal Base. Low profile design enables use on small surfaces including fences and small table tops. Requires two MagJigs to secure the Universal Base to a steel or cast iron surface. Accepts both MagJig 150 (150 lbs. of hold force) and MagJig 95 (95 lbs. of hold force). Simply add the desired tool attachment, place anywhere on any steel or cast-Iron tabletop, and you ready to go. Add more Bases and MagJigs to use multiple tools at the same time.