Tile Glass Hole Saws Core Bit Guide Efficient water inlet: The guide is designed with a water inlet slot at the hole opening to manage water during drilling. This helps cool the bit, improves drilling performance, and reduces mess. Function and usability: It helps you fix the drilling angle, provides strong suction, and makes drilling holes more convenient once the position is determined. Suitable for prepositioning before drilling on flat surfaces such as glass, tiles, marble, or any smooth surface. Secure suction base: A 4.53 inch diameter suction base keeps the guide firmly in place at your drill site, delivering stability and precision whether you are working on walls or floors. Material and durability: Built from stainless steel and rubber to ensure long term durability and reliability across various applications. Use scenarios: Drilling mounting holes in glass tabletops, glass doors, or other glass panels during installation. Prepositioning and drilling holes in ceramic tiles or marble countertops for fixtures, hardware, or plumbing. Working on smooth surfaces such as polished granite or porcelain tile where precise, aligned holes are required.