Wide Compatible: Suitable For 4/5/6/7/8/10/12Mm Drill Bits. Drill Holes For Glass, Tile Bottles, Block Pots, Fiberglass Porcelain Ceramic, Mable Slate, Lightweight Granite And MoreVacuum Base: Attaches To Most Tiled Surfaces By Means Of Its Lever Vacuum Base. The Suction Cup Base Has Good Resistance To Hold The Center Jig Tight And Well On A Smooth SurfaceEasy To Use: Sturdy Handle, Easy To Move And Use. The Drill Base With Strong Grip, So The Drill Guide Will Not Move, Making Your Operation Smoother. It Makes The Holes In The Tiles More PreciseDurable Plastic: Wear-Resistant And Durable Advanced Thickening Engineering Plastic. Made With High Quality Sealed Bearings For High Strength And Durability. Easy To Store And ReusePrecise Positioning: Ideal For Hard To Reach Areas Like Drilling Horizontally In A Tiled Wall Or Vertically In Floors Is Much Easier With This Guide