General description Made of high-quality material, this 4-83MM Drill Guide Diamond Bit Glass Tile Hole Locator Saw Core features a closed bearing design for convenient operation and reduced slipping. The super large positioning screw and thickened rubber sucker ensure a secure connection with ceramic tiles, preventing any movement during use. It is ideal for creating precise holes in glass, ceramic tile, marble, and ceramics. Technical specifications Length: 280mm / 11.02 inches Width: 200mm / 7.87 inches Clamping range: 4-83mm / 0.15-3.26 inches Material: Plastic Color: Green Installation Mark the hole to be punched. Insert the drill bit into the limit hole for positioning and press down the locking position of the sucker handle. Tighten the fixed position of the positioning shaft to stabilize the positioner. Start the drill to create the hole, ensuring to add water during drilling for cooling. Usage Designed for positioning holes in glass, ceramic tile, marble, and ceramics. Good