1、Made of engineering grade plastic, durable quality, not easy to get cracked as those fragile ones 2、Adjustable plates' opening length is 4-80mm, large enough to put in all sizes' hole saws 3、More accurate drilling, easy to store and can be used for many times 4、Suction base has good strength to hold the centering jig tight and well on smooth surface 5、Guide hole saw or drill bit to drill clear holes on tile, glass, marble, fish tank, granite, ceramic, etc Features: Made of engineering grade plastic, durable quality, not easy to get cracked as those fragile ones. Adjustable plates' opening length is 4-80mm, large enough to put in all sizes' hole saws. More accurate drilling, easy to store and can be used for many times. Suction base has good strength to hold the centering jig tight and well on smooth surface. Guide hole saw or drill bit to drill clear holes on tile, glass, marble, fish tank, granite, ceramic, etc. 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 Package Included: 1 x Adjustable Hole Locator Note: 1. Please allow 1-3mm error due to manual measurement. Please make sure you do not mind before you bid. 2. The colors may have different as the difference display, please understand. 3. Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.