DRILAX Drill Bit Hole Saw Guide Jig Fixture Vacuum Suction Base with Water Coolant Hole Adjustable Hole Saw Drill Guide Jig Fixture with Suction Base - Integrated Water Hole - Good Quality Adjustable Plate for All Sizes of Hole Saws up to 3-1/4" Drill Diameters - Dual Side Plate Removable Ball Bearings - Infinite Configurations - Flip the Plate for Larger Sizes up to 3-1/4" You Can Use the Guide to Start the Hole and Remove the Guide for the Remainder of the Holes Secure The Guide with Suction Base - Feed Water through the Integrated Hole