Description: Adjustable Drill Guide: This versatile Tile Glass openings Locator features an adjustable hole drill guide that accommodates sizes from 0.16inch-0.47inch, making it ideal for a variety of drilling needsSecure Suction Base: The suction base of the Tile Hole Saws Core Bit Guide ensures the guide stays firmly in place on your desired drilling place, providing stability and precision whether you're working on walls or floorsEfficient Water Drainage: Designed with double drainage slots on either side of the Glass Ceramic Tile Hole Opening Locator, it allows for effective water management during use, enhancing performance and reducing messMaterial: The Glass Ceramic able Hole Drill is made from alloy and plastic materials to ensure long term durability and reliability in various applications Function: This Hole Drill helps you fix the angle, has strong suction, and is much more convenient to drill holes after the position is determined. It is suitable for fixing the position before drilling holes on flat surfaces such as glass, tiles, granite, or any smooth surface Specification: Adjustable: 4mm-1.2cm/0.16inch-0.47inchComes with a set of hole drill in sizes 4mm, 5mm, 6mm, 7mm, 8mm, 10mm, and 12mm Package Includes: 1 Tile Glass openings Locator,6 Hole Opening Tools, 1 Tube) Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.