Features :1. Material: This hole saw guide is made of durable industrial grade ABS plastic that is hard to break. A tile hole locator can be used for years. 2. Adjustable plate size: The plate has an adjustable opening length from 4 to 83 mm. Large enough to fit all sizes of hole saws.4 removable bearings can be repositioned on the 9 bearing holes according to your needs. 3. Double stability: two vacuum suction bases have better strength than one suction base and keep the centering clamp on a smooth surface. 4. Easy to use and store: This hole saw guide provides more accurate drilling, easy to store, and can be used multiple times. 5. Wide applications: hole saw guide with water cooling holes widely used for drilling clear holes on tile, glass, aquarium, marble, granite, ceramics. Features: Materials: plastic, rubber. Colour: green. Types: double handle. Clamping range: 4-83mm. Approximate dimensions (L x W): 280 x 200 mm. Contents: 1 adjustable hole locator. Setup: 1. Make the marks that need to be punched. 2. Place the drill bit in the boundary hole for positioning, and press the suction cup handle to lock the position. 3. Tighten the positioning shaft to fix the position and stabilize the stabilizer. 4. Accurate opening, no lag in position.