Sibaok 15 Piece diamond drill bit is made of premium carbon steel, and together with diamond coating, and it is also regarded as the Diamond Core Drill Bits, Diamond Hole Saws or Bonded Diamond Drill Bits. - SPECIFICATIONS - Material: High quality carbon steel, Uniform diamond coating Color: Silver Cutting Depth: 1/2''(12.7 mm) Diameter: (Total 15 Piece) Including 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 25mm, 28mm, 30mm, 35mm, 40mm, 50mm Perfect for : Lithium Drill, AC Drill, Hammer Drill, Drill Press and so on - PACKAGE CONTENT - 15 * Sibaok Diamond Drill Bills 1 * Plastic Package - HOW TO DRILL CORRECTLY - 1.Firstly, mark the point where you want to drill the hole; 2.Next, fix the drill at the angle of 45°to make a drilling trace at a high rotating speed;and add water during the drilling process; 3.Then drill vertically from the other side of the drilling trace at a slow speed to prevent breakthrough.
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