Features: 1.MATERIAL: This holesaw guide is made of durable engineering grade ABS plastic and not easy to break a tile hole locator can be used for years. 2.ADJUSTABLE PLATE SIZE: The plate has an adjustable opening length of 4 to 83 mm large enough to fit in blades with all sizes of hole saws 4 removable bearings can be repositioned at the 9 bearing holes depend on your needs. 3.DOUBLE STABILITY: Two vacuum suction base has better resistance than one suction base and keeps the centering clamp on a smooth surface. 4.EASY TO USE AND STORE: This tile hole saw guide offers more precise drilling easy to store and can be used for multiple times. 5.WIDELY APPLICATIONS: Drill hole saw guide with water cooling holes widely use for drill bit to drill clear holes on tiles glass fish tanks marble granite ceramics. Specifications: Material: Plastic Rubber Color: Green TYPES: Double handle Clamping Range: 0.2-3.26inch/4-83mm Size: (Approx) (LxW. max) 280x200mm/11.02x7.8inch Package Included: 1 PC x Adjustable Hole Locator Install: 1. Make the marks that need to be punched 2. Place the drill bit in the limit hole for positioning and press down 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 offset in position Warm tips: Water or coolant liquid is suggested to use along with hole saw during drilling.