Technical grade plastic: Drill locator is made of engineering grade plastic, durable quality, not as easy to break as fragile, strong, durable, high hardness and strength, long service time. Multi-functional hole locator: The opening length of the adjustable plates is from 4 to 80mm, large enough to fit all sizes of hole saws. Meet your different drilling needs and quickly change the adapter. Smooth operation: The suction base has good strength to firmly hold the centering jig on a smooth surface. Adjustable hole locator with strong clamping force, so that the drill guide does not move away, making it smooth Easy to use: more accurate drilling, easy to store and can be used several times. The adjustable hole locator will not rust or break easily. Wide application: The hole locator can be used to drill holes in the surface of ceramic, glass or marble tiles, aquarium, granite, ceramic, small and compact size, easy to carry and store. Suction cup handleHinge placement Retractable chuck Chuck positioning knob Bearing positioning hole The drill locator can be extended and can be adjusted in many different sizes for use in many different guide rails. The opening length of the adjustable plates is from 4 to 80 mm, large enough to install hole saws of all sizes. The drill hole locator is made of engineering grade plastic, durable quality, not easy to crack like brittle. The suction base has good strength to keep the centering jig tight and well on smooth surface. Specification: Condition: 100% Brand New Material: Engineering plastic Color: Green Clamping Range: 4-80mm / 0.2-3.1inch Product Size: Approx. 15 * (18.5-25) cm / 5.9 * (7.3-9.8) inch Package Weight: Approx. 372g/0.82pound Note: Screws or drills for drilling clear holes on tile, glass, marble, aquarium, granite, ceramic, etc. 1. Please allow 1-3mm error due to manual measurement. Please make sure you don't mind before bidding. 2. The colors may have different as displaying the difference, please understand. Usage: 1. Mark where you need to drill holes 2. Place the drill bit in the limit hole, press the suction cup handle and lock the position 3. Tighten the positioning shaft wheel and secure the positioner 4. The result as below