General description This box contains 4 professional diamond drill bits designed for drilling through tiles, ceramics, porcelain stoneware, glass, and stone. Made from high-quality stainless steel and coated with diamond particles, these drill bits provide a stronger and more efficient drilling experience, making them ideal for delicate materials. Technical specifications Material: Stainless steel with diamond coating Shank size: 6mm Diamond coating depth: Up to 10mm Sizes included: 6mm, 8mm, 10mm, 12mm Usage Do not use with hammer mode Install only on a cordless drill (not battery-operated drills due to insufficient power) Designed specifically for drilling tiles; not recommended for materials behind the tile For horizontal drilling, apply light pressure; for vertical drilling, the weight of the machine is sufficient Drilling instructions: 1) Set drill to a 45° angle 2) Drill until the hole begins to form 3) Adjust to a vertical position 4) Continue drilling while swinging the