These are CLFM Diamond Core Drill bits. After a world-wide search, we have chosen this manufacturer as their core drills are very high quality which we can offer at an attractive price. We continue to also offer Raimondi core drill bits, see them on this link.
For cutting holes on porcelain, marble, single and double fired ceramic tiles, granite etc.
Humid use only. Use a sponge or spray bottle to keep the drill bit cool.
Always use PPE and a cordless drill.
Use with a standard drill (800-2,500 RPM). Long life. Offered in various sizes and in multiples for smaller bits.