JINGLING 3 mm 1/8" inch Diamond Hole Saw Core Drill Bit Masonry Drilling Cutter Tools for Glass Marble Tile Granite Stone Pack of 20Pcs

Ordered these bits to drill holes in my fused glass ornaments. I used a drill press for the work. So far, I’ve drilled over 50 holes with one bit and it’s still good to go! Love these bits!

JINGLING 3 mm 1/8" inch Diamond Hole Saw Core Drill Bit 's outdo what they advertised. I used the diamond bits through quartz crystals & they worked really well I'm impressed !

Very good drill bits, they serve their purpose. I used them to drill river rocks and although the process is slow, it was possible.

Bonne qualité perçage du granit assez facile

These have become my go-to bits for drilling pendants. They do a great job of cutting smoothly and cleanly through any Stones, even quartz. Being a hollow core drill bit, they do need to be cleaned often. I use a push pin to clean out the core. I find they are generally good for five to ten pendants.