Adjustable Plate Size: The plate has an adjustable opening length from 4 to 83mm, large enough to fit all hole saw sizes, 4 removable bearings can be repositioned in the 9 bearing holes as needed. Material: This hole saw guide is made of durable industrial grade ABS plastic and is not easy to break. The tile hole finder can be used for years. Double Stability: Two vacuum suction bases Provide better strength than a suction base and keep the centering clamp on a smooth surface Easy to Use and Store: This hole saw guide provides more precise drilling, easy to store and can be used multiple times. Wide Applications: Hole saw guide with water cooled holes, widely used for drilling clear holes in tiles, glass, aquariums, marble, granite, ceramics. Features: 1.Material: This hole saw guide is made of durable industrial grade ABS plastic and is not easy to break. a Tile hole finder can be used for years. p> 2. Adjustable Plate Size: The plate has an adjustable opening length from 4 to 83mm.