LATERN 15Pcs Diamond Drill Bit Set, Hole Saw Drill Bits Tools Diamond Hollow Core Cutter for Glass Tile Ceramic Marble Porcelain (φ6-50mm)

• [High quality] Made of high-strength carbon steel, nickel-plated on the surface, the tip of the bit is made of 80-100 grit diamond coating, high hardness, good abrasion resistance, sharpness, and long service life
• [Fast cutting] Tip head of diamond hole saw coated for a sharp, high precision and smooth cut, no broken edges, easy to cut into clean and accurate holes, center pilot holes and side holes help to remove the waste
• [Keep Cool & Low Speed] Work with all electric drill and impact drill, please keep the speed in 800-1000 per minute, keep adding water to keep the drill cool, strictly prohibit from dry drilling
• [15 Sizes] Diamond drill with laser marked size, easy to recognize: 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 25mm, 28mm, 30mm, 35mm, 40mm, 50mm, all at 50mm length
• [Applicable] Great for making glass crafts and projects, wine bottles, glass block, sea glass, tile, porcelain, ceramic, china, granite and more. Not for use on concrete or depths beyond 1/2 "(12.7 mm)

LATERN 15Pcs Diamond Drill Bit Set made from high strength carbon steel with nickel plating surface, so these drill bits durable and precise, the bit's tip head is made of 80 grit diamond coating, which is uniform, it great helps to increase the drilling speed and more sharper than other ordinary hole saws, great for making glass crafts. Use Range: - With all your glass crafts and projects. - Drill holes in wine bottles and glass block. - Drill sea glass to make beautiful jewelry. - Drill ceramic tile, porcelain, china, ceramic, fiberglass, marble, granite, quartz, slate, cast iron soil pipe and more. How to Use: 1. Use pen to mark a circle. 2. Start hole at an angle of 45 degree slowly. 3. Make a round trace and then hold diamond drill straight. 4. Slow speed down for exit hole or drill from the other side from the other side to prevent breakthrough. Caution: ◆By Reducing the Drilling Speed, and Continue to Add Water Cooling to Extend the Life of Drill Bits (Dry drilling is Strictly Prohibited). ◆ Do not use on concrete or for depths beyond about 1/2 ''(12.7mm). Specifications: Material: High speed steel, Diamond coating Length: 50mm Shank diameter: 6mm Color: Silver Cutting Depth: 1/2 "(12.7 mm). Package included: 1 x Diamond Hole Cutter 6mm 1 x Diamond Hole Cutter 8mm 1 x Diamond Hole Cutter 10mm 1 x Diamond Hole Cutter 12mm 1 x Diamond Hole Cutter 14mm 1 x Diamond Hole Cutter 16mm 1 x Diamond Hole Cutter 18mm 1 x Diamond Hole Cutter 20mm 1 x Diamond Hole Cutter 22mm 1 x Diamond Hole Cutter 25mm 1 x Diamond Hole Cutter 28mm 1 x Diamond Hole Cutter 30mm 1 x Diamond Hole Cutter 35mm 1 x Diamond Hole Cutter 40mm 1 x Diamond Hole Cutter 50mm