29mm Ultra-Thin Diamond Hollow Core Drill Bit – 60mm Depth for Jasper, Agate, Glass & Hard Stone Drilling | Lapidary & Industrial Grade

Maximize efficiency and precision with our 29mm Diameter × 60mm Depth Ultra-Thin Diamond Hollow Core Drill Bit—the ultimate tool for both lapidary enthusiasts and industrial hard-material fabricators.

Crafted with premium electroplated diamond grit and an ultra-thin wall profile (typically <1.0mm), this drill bit delivers clean, accurate holes in even the toughest materials—including jasper, agate, onyx, quartz, granite, engineered stone, and tempered glass—with significantly reduced risk of cracking or chipping.

Key Features:

• 29mm drilling diameter – perfect for bracelet cores, cabochon removal, and specimen sampling
• 60mm working depth – handles thick slabs and deep-core applications
• Ultra-thin wall design – minimizes kerf loss and preserves valuable material
• Industrial-grade diamond coating – long-lasting performance under wet drilling conditions
• Compatible with standard rotary tools & drill presses (requires water cooling)

Whether you're crafting artisanal gemstone jewelry or cutting technical samples in a lab or workshop, this hollow core drill delivers professional results with superior speed and control.

Recommended Use: Always use with continuous water cooling and low-to-moderate RPM (800–2,500 RPM) to extend tool life and ensure safety.