| Specifications:Made of high quality diamond material with fine workmanship, it is very durable, wear-resistant and easy to use.During processing, it has the advantages of no chipping, fast speed, sharpness and wear resistance.It is suitable for drilling stone, ceramics, vitrified tiles, glass, etc.Item Name: Hole OpenerMaterial: DiamondDrill Bit Models: 50mm, 55mm, 60mm, 65mm, 70mm, 80mm, 85mm, 90mmFeatures: Fast Drilling Speed, Long-Lasting, Durable, Wear-Resistant, Easy to UseSize: 50mm/1.97", 55mm/2.17", 60mm/2.36", 65mm/2.56", 70mm/2.76", 80mm/3.15", 85mm/3.35", 90mm/3.54" (Approx.)Notes:First, it is positioned at a 45 inch bevel, and drills vertically, the speed should not be too fast, … | |