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!

I am using these to drill into agate slices, though I have also used them to grind down sharper edges on them as well as drill through small gemstone chips. They seem to work really well if you use cool water mixed with a little bit of dawn dish soap. I can drill a hole in about 3-4 agate slices before I feel like I need to swap out bits with the 1mm bits. I paid $10 for these at the time and they're $12 now, and I would buy them again at this price if I needed to. They're cheap compared to big box stores, and the diamond bits they sell there do not compare to these when you take price to longevity into account.

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.

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

I read every review I could find on Amazon and felt that these Diamond bits were the best available. Upon using to drill sea glass, the 2 and 3 mm bits work well, but the 1 mm bits failed miserably. Upon inspection with a 10 x magnifying glass, I noted very few diamond crystals on the tip of the 1mm bit. It was taking 5-10 minutes to drill through a 5 mm piece of glass. I broke at least one bit and shattered 2 pieces of sea glass. Eventually I gave up. I did some more searching online and found Lasco which cost significantly more. in desperation I purchased ten 1.5 mm bits for about $20. Well worth the money. I was able to drill my entire collection of sea glass and ceramics with ease, about 20 seconds per piece. The bit lasted for 26 pieces. Could probably drill a few more, but upon inspection about 75% of the diamond crystals were now gone. I used a micro mill on the lowest setting and drilled under water. I would recommend any serious hobbyist use a better product. Lasco worked well for me. https://www.amazon.com/dp/B00285XY0S?psc=1&ref=ppx_yo2ov_dt_b_product_details

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.

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