Jamiikury 3-1/2" / 90mm Diamond Hole Saw Drill Bits for Ceramic, Glass, Tile, Porcelain, and Marble

SMALL DRILL BIT: Hole diameter: 90mm(3-1/2"),total length: 56mm(2.2").Package includes 1 pcs 90mm diamond hole saw drill. HIGH QUALITY: Diamond ceramic hole saw are made of industrial grade carbon steel and have a nickel-plated coating to resist corrosion. LARGE CLEARANCE HOLE: These glass hole saw set along the drill bit facilitate the entrance of cooling water and escape of chips and other particles from drilling. Makes the drilling process easier. APPLICATION: Suitable for drilling glass, ceramics, porcelain, ceramic tile, porcelain tile, limestone, marble, light stone and fiberglass. WARM TIPS: Start drill at 45 Degree to surface and align to 91 Degree as hole forms.Water is required to cool down the drill when using them which will greatly extend the life of the bit.