Made of engineering grade plastic, durable quality, not easy to crack like flimsy onesAdjustable plates opening length is 4-80mm, large enough to fit in all size hole sawsMore accurate drilling, easy to store and can be used multiple timesThe suction base has good strength to hold the centering jig well and well on the smooth surfaceGuide hole saw or drill bit to drill clear holes on tile, glass, marble, fish tank, granite, ceramic, etc.Product Features Tile hole cutter made of engineering grade plastic, durable quality, not easy to crack like flimsy onesThe opening length of the adjustable plates is 40-80mm / 1.57-3.15, large enough to fit into hole saws of all sizes Easy to store and can be used over and over again The suction base has good strength to hold the centering jig tight and well on a smooth surface Vacuum suction base with coolant hole for tiles, glass, aquariums, marble, granite, ceramicsPackage Included: 1 x Adjustable Hole LocatorPlease allow 1-3mm error due to manual measurement. Please make sure you do not mind before bidding. The colors may have different as the difference display, please understand. Usage: 1: Mark the places where you need to drill holes. table hole finder 2: put the drill bit into the limit hole, press the handle, lock the position 3: Tighten the positioning shaft wheel and fix the positioner Specification: Material: Engineering Plastic The color green Clamping range: 4-80 mm / 0.2-3.1 inch Product size: approx. 15*(18.5-25)cm/5.9*(7.3-9.8)inch Package weight: approx. 372g