Features: Diamond bits are made of high-quality brazed diamond materials, which is durable and stable High-quality hole pitch drill bit set, reducing drilling pressure and increasing the use of water lubrication will greatly extend the service life of the drill bit. Applicable to granite, marble, stone brick, ceramic tile, etc. Fast and Smooth drilling ,Long lifetime,Less Chipping The diamond drill can be used wet or dry, wet using will greatly prolong the segment life, fit on a high-speed angle grinder Package Includes: 1 Set Diamond Drill Bits Specifications: Material: Brazed Diamond Height:67mm/2.64inch 65mm/2.56inch note: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you place order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!