1. durable. 2. Closed bearing, make opening more convenient, not easy to slip. 3. Super large positioning screw and thickened rubber sucker make the positioner connect with the ceramic tile, and the opening does not slip. 4. Application, it can be used for positioning holes in glass, ceramic tile, marble and ceramics.<br><br>The length is 280mm/11.02inch, the width is 200mm/7.87inch, and the clamping range is 4-83mm/0.15-3.26inch Use Steps: 1. Mark the hole to be punched. 2. Put the drill bit into the limit hole for positioning, and press down the locking position of the sucker handle. 3. Tighten the fixed position of the positioning shaft and stabilize the positioner. 4. Start the drill to open the hole. Note: water must be added during drilling. Good cooling can prolong the service life of the drill bit. color:Green Material:plastic<br><br>Package Contents: 1 x Glass Tile Hole Locator<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.