Corded Drills, Drivers -Hole Saws Highlights Generic Hole Saws Brand Description: Adjustable Hole Saw Drill Bit Guide Drill Guide Device with Vacuum Base Suction Cup. A small size, medium large position, can be put into a 4-80mm driller. Attach the guide with the suction base, circulate the water through the built-in hole. You can use the guide to start the hole and remove the guide for the rest of the holes. This suction cup is designed for glass and tiles even in small sizes and it is easy to attach to cooling systems. Good reliability and service life, is useful and durable. Specification: Material: Plastic The Color Green Size: Approx. 140 x 160 x 30mm / 5.51 x 6.3 x 1.18inch Package includes: 1 Piece Glass Tile Openings Hole Saw Locator Note: The color may have different as the difference display, pls understand. Please allow 1-3mm error due to hand test.