2.5mm Diamond Drill Bit Set, 20-Piece with Collet – Sea Glass, Shells & Gemstones

• Materials: Sea glass, glass, seashells, gemstones, stone, rock, ceramic and porcelain.
• Tools: Rotary tools such as Dremel, flex shafts, drill stands and other lapidary equipment, using the included collet.

• Fit the Collet: Put the included brass collet in your rotary tool, insert the bit and tighten it securely.
• Keep It Wet: Drill with the piece and bit under water or with a steady drip. Water keeps the tip cool, protects the piece and makes each bit last longer.
• Start at an Angle: Begin at an angle to cut a small notch so the bit doesn't walk, then slowly bring the tool upright.
• Light Pressure, Low Speed: Let the diamond do the work. Pushing hard or running fast and dry wears the coating quickly and can crack delicate pieces.

• Sea Glass Jewelry: Drill beach glass for pendants, necklaces and earrings.
• Shells and Gemstones: Make hanging holes in seashells, gemstones and small stones.
• Beads and Bracelets: Drill beads and small pieces for bracelets and custom jewelry.
• Crafts and Keepsakes: Turn beach finds into keepsakes and handmade gifts.

• Bit Diameter: 2.5mm (0.098")
• Quantity: 20 diamond drill bits
• Tip: Twist tip with 135° split point
• Body: Alloy steel with diamond coating
• Mounting: 1 brass collet included, to hold the bit in your rotary tool
• Recommended Use: Wet drilling, with water

Q: What size hole does it drill?
A: Each bit drills a 2.5mm hole (about 0.098"). All 20 bits are the same size.
Q: Will it fit my Dremel?
A: Yes. Use the included brass collet to hold the bit in Dremel and other rotary tools, flex shafts and rotary drill stands.
Q: Do I need to use water?
A: Yes. Drill wet, with the piece under water or a steady drip. Water keeps the diamond coating cool, protects delicate materials from cracking and makes each bit last longer.
Q: How do I stop the bit from slipping on glass?
A: Start at an angle to cut a small notch, then bring the tool upright slowly once the hole has started.
Q: How long does each bit last?
A: Small diamond bits wear with use, which is why they come in multi-bit sets. Drilling wet, at low speed and with light pressure keeps each tip cutting longer.
Q: What materials can I drill?
A: Sea glass, glass, seashells, gemstones, stone, rock, ceramic and porcelain.
Q: What can I make with them?
A: Earrings, pendants, bracelets, necklaces and other custom jewelry and craft pieces.