2.5mm Diamond Wire Hollow Core Drill 65mm, 20pcs – Precision Lapidary Coring

Precision 2.5mm Extra-Long Diamond Wire Hollow Core Drills (65mm Length, 20-Pack) engineered for delicate lapidary coring, bead making, and jewelry fabrication. The thin-wall hollow wire design reduces cutting resistance and heat generation, delivering clean, accurate holes with minimal material loss and blowout.

Key Specifications

• Outer Diameter: 2.5 mm
• Total Length: 65 mm (Extra Long)
• Package Quantity: 20 pieces
• Abrasive Type: Electroplated high-grade diamond grit
• Drill Type: Hollow wire / core drill

Recommended Applications

• Precious and semi-precious gemstones (agate, jade, jasper, quartz)
• Glass, sea glass, and fused art glass
• Ceramics, porcelain, and stone beads

Operating Tips

• Always use continuous water coolant or submerge drilling area to prolong tool life and avoid thermal fracturing.
• Use light, consistent feed pressure; allow the diamond grit to cut without excessive force.
• Compatible with rotary tools, micro-motors, and benchtop drill presses with appropriate collets.