3 Pcs 12mm Diamond Tile Drill Bit Set for Granite, Ceramic, Marble, Stone, Glass - Hard Materials Round Shank Dry Drilling

PACKAGE CONTENTS: The package contains 3 diamond drill bits. Diameter: 12mm. Total length: 66mm HIGH-QUALITY MATERIAL: These heavy-duty drill bits are coated in diamond particles to create a stronger bit head, can drill hole quickly. strong and durable, can use for a long time DRY DRILLING DESIGN: Diamond drill bit integrated with wax lubricant inside which melts while dry drilling and cools the cutting surface; Water can be used as additional cooling to prolong the life of the bit. To make the job easier, start drilling at a 45-degree angle and gradually raise the drill to an upright position DESIGN: The diamond drill is designed in a firmly round shank, which is compatible with most machines, such as hand drills, angle grinders, and bench drills, also can be matched with side flutes help to remove debris and drill holes smooth and fast; Depth mark is also useful for precise project APPLICATION: Diamond drill bit sets are designed for working with such materials as stone, granite, marble, porcelain, ceramic & hard tile