Sworker Diamond Drill Bits 1mm 1.5mm 2mm 2.5mm 5 Each 120-Grit 20Pcs with 4 Collets Compatible with Dremel Rotary Tool for Sea Glass Stone Shells Jewelry Making Porcelain Ceramic Gems

Sworker Diamond Drill Bits 1mm 1.5mm 2mm 2.5mm 5 Each 120-Grit 20Pcs with 4 Collets Compatible with Dremel Rotary Tool for Sea Glass Stone Shells Jewelry Making Porcelain Ceramic Gems

• Complete 20Pc Diamond Drill Bit Set with 4 Collets: Includes 5 each of 1mm, 1.5mm, 2mm, 2.5mm diamond coated twist drill bits. Each size comes with matching brass collet for secure fit in Dremel and similar rotary tools.
• Perfect for Sea Glass, Stones & Jewelry Making: Drill clean holes through sea glass, shells, agate, quartz, amethyst, and gemstones. Ideal for creating pendants, necklaces, and wire-wrapped jewelry pieces.
• Water Cooling Extends Bit Life: For thick materials like glass and stone, submerge in water or use continuous water flow to prevent overheating and cracking. Thin shells may not require water cooling.
• Premium 120 Grit Diamond Coating: High-quality diamond grit coating provides smooth, precise holes. Twist drill design with matching collets ensures stable drilling without slipping or wandering.
• Four Versatile Sizes for All Projects: 1mm to 2.5mm range covers pilot holes to larger pendant holes. Great value pack for hobbyists, jewelry makers and crafter.