Engineering Grade Plastic: The drill bit locator is made of engineering grade plastic, durable quality, not as easy to break as brittle, strong, durable, high hardness and strength, long service time. Multi-function hole locator: The opening length of the adjustable plates is 4-80mm, large enough to fit hole saws of all sizes. 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 the drill guide won't move away not, which makes it fluid Easy to use: More precise punching, easy to store, and can be used multiple times. Adjustable hole locator won't rust or break easily. Wide Application: The drill locator can be used to drill holes in the surface of ceramic, glass or marble tiles, aquarium, granite, ceramics, small in size and compact, easy to carry and store. store. Specification:Condition: 100% Brand NewMaterial: Engineering plasticColor: GreenClamping Range: 4-80mm / 0.2-3.1inchProduct Size: Approx. 15*(18.5-25)cm/5.9*(7.3-9.8)inchPackage Weight: Approx. 372g/0.82poundNote: Guide saw or drill bit for drill clear holes on tiles, glass, marble, aquarium, granite, ceramics, etc.1. Please allow 1-3mm error due to manual measurement. Please make sure you do not mind before bidding.2. The colors may have different as the difference display, please understand. Usage:1. Mark where you need to drill holes2. Put the drill bit into the limit hole, press the suction cup handle and lock position3. Tighten the positioning shaft wheel and fix the positioner4. The result as below