Professional ceramic tile positioning hole opener: This product is a glass tile hole locator, used to help position the hole. With the positioning hole opener, there is no need to worry about the drill bit slipping because the glass and tiles are too smooth when opening the hole. THICKENED SUCTION CUP WITH STRONG SUCTION: The product has two thickened rubber suction cups with strong suction power, which can be easily fixed on the perforated surface by pressing the handle. More stable: Different from the traditional single suction cup drill guide, our tile hole locator adopts a three-point design. double suction cup, which has good strength and prevents side sliding or falling to hold the template firmly. ROLLING SLIDING RAIL DESIGN: The rolling sliding rail design makes it easy to position drill bits of different sizes; four bearings clamp the drill bit to determine the position; two oversized positioning screws, easy to rotate and lock, and accurate drilling. WIDELY USED: The hole saw guide template is suitable for drilling and positioning glass, ceramic tiles, marble and ceramics.