SAVE TIME AND EFFORT: Made of high quality material, the drilling speed is fast, saving time and effort and improving work efficiency FAST DRILLING SPEED: Sharp cutting head ensures fast drilling speed and large displacement cutting design DRILLING VARIOUS MATERIALS: Suitable for drilling granite, ceramic tile, concrete, marble and other materials M14 INTERNAL THREAD: vacuum-soldered drill hole diameter for 40 mm, total length 60 mm, M14 internal thread, very practical LONG LIFE: The hole saw drill bit has stable structure, excellent performance and long service life Function: 1. TIME AND EFFORT SAVING: Made of high quality material, the drilling speed is fast, saving time and effort and improving work efficiency 2. FAST DRILLING SPEED: Sharp cutting head ensures fast drilling speed and large displacement cutting design 3. DRILLING VARIOUS MATERIALS: Suitable for drilling granite, ceramic tile, concrete, marble and other materials 4. M14 FEMALE THREAD: Vacuum brazed drill hole diameter for 40mm, total length 60mm, M14 female thread, very convenient 5. LONG LIFESPAN: The hole saw drill bit has stable structure, excellent performance and long service life Specification: Item Type: Vacuum Brazed Diamond Bur Material: Diamond Color: black Hole diameter: Approx. 40 mm Total Length: Approx. 60mm/2.36inch Internal thread: M14 Scope of application: marble, granite and other stone openings Package list: 1 x vacuum brazed diamond drill bit