Diamond Drill Bits for Stone – 30-Piece Mixed Size Set for Glass, Gemstones & Jewelry – 1/8-Inch Shank Compatible with Dremel Rotary Tools – Jewelry Making Supplies & Lapidary Kit

Material Diamond (Coated) Cutting Diameter 1-2-3 Millimeters Finish Type Nickel Shank Type Round Cutting Angle String 135 Degree

• 【High quality】Diamond bits mounted with premium diamond particles, durable excellent and sharp cutting, Works on glass, stone, ceramic, jade, jewelry and other hard material.
• 【Feature】Various grinding head shape: ball, cylinder,cone,needle, oval, inverted cone, etc, meet your different carving/engraving need
• 【Ease to use】All diamond burrs with 1/8" shank, compatible with most rotary tools and die grinders. Note: replace the rotary collet with 3.2mm before using.
• 【Widely used】Highly recommended for carving and polishing stones, metal, jade and ceramic, DIY craft, craft modeling, home repair etc.
• 【Package includes】30pcs diamond grinding bits packaged in a sturdy plastic box, falling resistant and moistureproof, easy to carry and stock, well organized to prevent scattered and confused.
• Essential Lapidary & Jewelry Making Companion: A must-have addition to your tool kit accessories and lapidary equipment. Whether you're a beginner or an experienced artisan, these versatile bits empower you to create beautiful, high-quality jewelry and art pieces.
• Expert Tips for Best Results Like jade cutting, jade drilling also requires water cooling—this is especially important when using a synthetic diamond drill bit. Ensure sufficient water cools the bit; otherwise, heat will cause the synthetic diamond to carbonize, damaging the bit. When drilling, advance the bit slowly and retract steadily. Apply even pressure when pressing down; uneven force may easily break the bit or crack/damage the jade, especially with brittle jade or thin-slice pieces. Secure the jade firmly during drilling or core drilling. If it loosens, the drill may deviate, or the jade could even chip off and get damaged.