60 Pcs Diamond Drill Bits, 1mm 2mm 3mm Mix Set Jewelry Drill Bits for Jewelry, Sea Glass Shells, Gem Stones Lapidary, Jewelry Making

I recently purchased this 60-piece Diamond Drill Bits Set for jewelry making, and I’ve been really impressed with the quality and performance. Here’s a breakdown of my experience:Pros:✅ Great Variety of Sizes – The set includes a mix of 1mm, 2mm, and 3mm drill bits, which is perfect for working on different materials and projects.✅ Sharp & Durable – The diamond coating on these bits is high-quality, allowing them to cut through sea glass, gemstones, shells, and other hard materials with ease.✅ Works Well with a Rotary Tool – They fit standard rotary tools like Dremel, making them convenient for detailed jewelry work.✅ Precision Drilling – The small sizes allow for precise drilling, especially for delicate pieces like beads, pendants, and charms.✅ Great Value – With 60 pieces, this set lasts a long time, even with regular use. It’s a great deal compared to buying individual bits.Cons:❌ Needs Water Cooling – Like all diamond bits, they work best when used with water to prevent overheating and extend their lifespan.❌ Not for Heavy-Duty Use – These bits are ideal for jewelry and light lapidary work but may wear out quickly if used on very hard stones or thick glass frequently.Final Verdict:This diamond drill bit set is a fantastic choice for jewelry makers and hobbyists working with delicate materials. The variety of sizes, sharpness, and overall quality make it a valuable addition to any craft setup. Just remember to use water for cooling, and you’ll get great results!

These are great drill bits for the price. No problem drilling through shells to make jewelry.

I wouldn't bother with these. I went through two bits in a matter of minutes drilling a hole in a rock I polished. I used a spray bottle to spray the bit and rock as I drilled. The first bit stripped quickly and stopped drilling within 30 seconds. The second broke within seconds of starting to use it. I'm using a dremel with the dremel workshop to drill a straight hole. At this rate, I'll have to buy many more in order to do what I want to. Use your money on more sturdy bits.Update: I'm updating my review because I saw a different review saying these work much better if you run cold water on the stone and bit while drilling. I tried that and have been able to drill 2 to 3 rocks with 1 bit. Yes, some break right away but I think that's because the bit slips slightly sideways sometimes and creates a sideways pressure which then breaks the bit or the rock. So I go slowly and make sure the rock is secure so the bit isn't getting any sideways pressure. I've made 11 pieces successfully but have gone through about 8 bits figuring it all out.

Exactly what I ordered

These diamond bits 1 ml., not so good! Might drill one or two holes! The 2 ml. Bits much better, can drill several 1/4" depth holes in quartz. Have not used the 3 ml. Yet.

Very happy with these little bitsUsed them for drilling glass projects. Happy

Using a brand-name rotary tool in a drill press, these bits were a complete waste of time and money.The smallest bits heat up too fast -- even with a constant flow of water and at lowest speed -- and the metal of the shaft melts and deforms after about 5 minutes, during which time I made almost no progress in putting a hole in something about Mohs 5 hardness.The larger bits last a bit longer, long enough to make a bit of a groove in red agate (Mohs 6.5 to 7.0), before becoming completely ineffective. As best I can tell, all of the diamond grit just wore off the tip.That seems to have also been the problem trying to drill through shark teeth, which is a Mohs 5 hardness. almost three minutes of watering, drilling with the press going up and down to allow water in the hole, produced nothing more than a small blackened divot.The description of the bits specifically mentions sea glass (Mohs 5.5 to 6.0), sea shells (3.5 to 4.0), and lapis lazuli (5.0 to 5.5), and being diamond (Mohs 10) it should have made at least some progress in the ~5.0 stuff I attempted, but it did nothing more than ruin the pieces.Just garbage. Don't waste your money.

I bought these bits to drill holes in a number of porcelain tiles. The bits are very inexpensive so I didn't fear breaking a few in the process, but none did. The bits are pretty true but a few wobbled in the drill. Not worried with a box full to choose from. I only used one bit to drill all my holes with smooth hole sides and easy penetration through the porcelain surface. I have so many bits left that i will be giving some away to anyone who asks because of how well they worked and how many you get.