40pcs Diamond Drill Bits Set, 1/1.5/2/2.5mm Micro Tip Drill Bits Compatible with Dremel Rotary Tools, 2.35mm Shank Drill Bits Set for Sea Glass, Ceramic Tile, Granite, Jewelry Making Accessories

• 40 Pcs Comprehensive Set: Includes 40 pieces of micro diamond drill bits in 4 practical diameters (1mm, 1.5mm, 2mm, 2.5mm), with 10 pieces of each size. Provides an extra dimension option for intricate jewelry making, carving, and delicate precision tasks
• Extended Design & Premium Material: Crafted from sturdy iron and coated with premium emery particles. The extended length allows for deeper penetration into holes and narrow crevices, ideal for grinding and polishing thick jade beads or intricate crafts
• Universal Compatibility: Featuring a standard 2.35mm shank diameter, these versatile sanding accessories are highly adaptable and compatible with Dremel and most standard rotary tools on the market
• Multi-Surface Grinding: Excellent for shaping, polishing, and drilling a wide variety of hard surfaces. Highly effective as a glass drill bit, and works smoothly on sea glass, ceramic tile, granite, stone, marble, and other lapidary materials
• Important Usage Guidelines: For optimal performance and to reduce needle breakage with extended bits, first drill a pilot hole using a shorter bit before using the long bit to deepen the hole. Always operate at lower speeds when using longer bits to maintain stability

Optimized Product Description: Elevate Your Crafting Precision Discover precision and durability with our 40-Piece Diamond Drill Bits Set. Designed for jewelry makers, lapidary enthusiasts, and DIY crafters, this comprehensive set offers reliable performance for your most intricate projects. Upgraded 4-Size Selection Unlike standard sets, our package includes 4 distinct sizes—1mm, 1.5mm, 2mm, and 2.5mm (10 pieces of each). This extra size variation gives you the exact dimensions needed for micro-drilling, ensuring seamless adaptation to various detailed tasks. Extended Reach for Deep Processing Engineered with premium iron and coated with robust emery particles, these bits feature an extended design. They effortlessly reach into deep holes and narrow crevices, making them highly effective for grinding and polishing thick materials like jade beads, sea glass, and ceramic tiles. Crucial Operational Tips: To achieve the highest efficiency and extend the lifespan of your bits, proper technique is strictly required: When working on deep holes, begin by drilling a pilot hole with a shorter needle. Once the initial hole is established, switch to the extended needle to deepen and drill through. Always operate at a lower speed when using longer rods to ensure stability and avoid breaking the needle. Specifications: Material: Iron, Emery Particles Shank Diameter: 2.35mm Head Diameters: 1mm, 1.5mm, 2mm, 2.5mm Package Includes: 40 x Diamond Drill Bits