【Package Includes】7pcs 1/4" 1/4" 5/16" 4/5" 1-3/8" 2" 2-1/2" (6/6/8/20/35/50/65mm) diamond drill bits, 1pc 4/5" diamond milling Bit, 1pc 2" diamond beveling chamfer bits, 1pc 5/8"-11 to SDS Shank Adapter, 2pcs 4.5" diamond blade 【Application】Dry or wet use. For ceramic tile, marble, granite, and masonry. Wet drilling reduces debris for longer bit life 【Advanced technology】Vacuum brazing technology enables higher-performing components with extended operational life 【Portable】Packaged in a portable case for easy storage and portability 【Machine】Suitable for 5/8-11 thread angle grinder. If you want to use electric drill or other machine, you can use Adapter in the package.Minimum RPM: 2000; Faster the RPM, Longer the Working Life. Please contact us if you encounter any issues – we're committed to your satisfaction