Diamond Finger Milling Bits,MINLAYCUT 4/5"-1-3/8" (20mm-35mm) Dry Core Drill Bit with 5/8-11 Thread for Enlarging Shaping Existing Holes of Porcelain Tile Ceramic Marble Granite

Features & details Features 【Size】Diameter：4/5"(20mm)-1-3/8"（35mm）, 50mm workable length, 5/8"-11 Thread, Grit:#50/60, toal Length 65mm 【Tips】 It is not recommended to drill as a drill bit; It is mainly to enlarge the formed hole or process the hole with special shape; 【Application】 Multifunctional use-Reaming, hole enlarging, hole shaping, side grinding in Ceramic Tile Porcelain Tile Marble Granite 】【Cost Effective】--You can use only one size core bit and this finger bit to create different size of holes! 】【Note】Suitable for 5/8"-11 thread angle grinder；Recommended RPM is 6000; Maximum RPM is 11000.

If you fit them on electric drill or other machine, you need an adapter such as Hex Shank or SDS Plus Shank.