30 pcs Set 10 pcs. 1mm 10pcs. 2mm 10 pcs. 3mm Diamond Drill Bit Cylindrical Burr Kit Jewelry Beach Sea Glass Shells Gemstones Lapidary 30pcs. 1 mm 2 mm 3mm (1/8")

Wasn't sure these would work because they look so different from the expensive ones I bought at the local hardware superstore, but I'm pleased to report that looks can be deceiving. The larger ones worked wonders on my 1/8th inch thick glass pieces. I've made several chimes using just two ... about 10 holes easily and another 10 with more patience. The really small size is only for very thin, delicate glass, ... jewelry maybe.

As described

They do the job, but seem a bit flimsy. Maybe user learning curve as I haven’t mastered the balance of water, speed, and pressure while working with rocks. Time will tell.

Bought these for drilling through small stones for crafting. Work great and seem to hold up very well.

Semi hard to find product. I found them and delivered fast as described. I'll buy them again.

it would take at least 2 to 4 drill bits to get through every rock i tried on them they were so cheap. I'm sticking to my usual brand and returning these.

It worked great for what I needed to do with drilling holes in sea shells and sea glass.

Tips do go quickly as the ad tells you, however that was really quick. Don't rush the job and you'll be much happier with the product.