The MARK Sawing Blank Table Insert with Slot features a pre-formed square cutout in the center for inserting the upper saw guard during operation. Made of a special polymer, you should make one for each sawblade you’re planning to use.  This special Polymer Table Saw Insert is the model to choose when you need a zero clearance setup to:

• Make cuts with the Upper Saw Guard in position to ensure optimal safety and dust collection efficiency
• Provide maximum workpiece support when cutting small or thin pieces of stock
• Eliminate dangerous scrap fall-through

Note: For all MARKs except MARK V 500