40mm Sintered Diamond Core Drill – Durable & Efficient for Gemstone, Glass & Ceramic Cutting felt wheel polishing or prepping hard metals

or prepping hard metals

Designed for fine grinding and precision lapping

For best results and longer service life

Helix Head Bits (3/4" & 1") – Helix diamond patterns draw water to the grinding surface for cooler operation

these discs are perfect for lapidary work

40mm Sintered Diamond Core Drill – Durable & Efficient for Gemstone, Glass & Ceramic Cutting felt wheel polishing or prepping hard metalsOverview High Performance Sintered Diamond Core Drill The Sintered Diamond Core Drill is engineered for high performance drilling in ultra hard materials like stone, glass, ceramics, and metals. Its sintered diamond matrix ensures unmatched durability and precision, making it indispensable for industrial, lapidary, and artistic workflows. Engineered for professionals who demand durability, accuracy, and long lasting performance, our Sintered Diamond