Versatile Drill Guide Sizes: This Tile Glass openings Locator includes drill guides in sizes 4, 5, 6, 6.5, 8, 10, 12, and 13mm, providing flexibility for various drilling needsMaterial: The Tile Glass Hole Saws Core Bit Guide is made from a combination of alloy and plastic materials for long term durability and reliability in various applicationsEffortless Drilling on Smooth Surfaces: Th Glass Ceramic Tile Hole Opening Locator is ideal for horizontal wall drilling or vertical floor drilling on materials like ceramic, glass, granite, porcelain, or any smooth surfaceSecure Suction Base: The suction base ensures the guide stays firmly in place at your desired drilling location for accurate and accurate holesPackage Included: 1 Glass Ceramic Hole Drill Guide Specification: Comes with a set of hole drill in sizes 4mm,5mm, 6mm, 6.5mm, 8mm, 10mm, 12mm, 13mm Package Includes: 1 Tile Glass openings Locator Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.