• Set of 6 diamond drill bits designed for drilling hard materials such as porcelain stoneware, granite, quartz, marble and glass. • Includes a variety of sizes with diameters of 5, 6, 8, 10 and 12 mm to adapt to multiple construction projects. • 1/4 inch hex shank that ensures a firm grip on electric, cordless or bench drills, preventing slipping. • Filled with internal cooling wax that allows for both dry and wet drilling with greater efficiency. • Double slot design that extends the bit's lifespan by allowing for interchangeable use between slots. • Equipped with an integrated carbide triangular bit to guide drilling and achieve precise positioning. • Manufactured with advanced diamond technology with 50/60 grit for superior durability in demanding applications.