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