Features Milling Cutter: Mainly used for the hole milling, trimming, shaping, enlarging and so on, suits for various hole diameter. Practical Uses: Allows for application on a variety of stone material, including but not limited to granite, quartz, etc. Stable Working: 5/8‑11 thread design enables firm fixing without falling, while the heat dissipation holes ensure stable working. Great Material: Premium diamond material has largely improved the sharpness, which also has great durability with wearing. Easy to Install: Comes with a light weight and a compact size as well, the installation can be quickly finished in minutes. Specification: Item Type: Diamond Milling Bit Material: Alloy steel, diamond.  Package List:1 x Diamond Milling Bit Note:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. Package List 1 x Diamond Milling Bit