1-3/8"APEXX Thin-Wall CNC Core Bits w/ Inside Diamond Protection

Built with super-soft bond and highest-quality diamonds;

Work great on the hardest stones such as UltraCo,mpact surfaces, natural quartzite and hard granite;

The brazed diamond inside of the thin-wall barrel makes it easy to take out the stone plugs after drilling holes;

Small diameters (6mm, 8mm, 10mm & 12mm) don't have brazed diamond protection;

Standard 1/2"Gas threads;

Material: Natural Quartzite, UltraCompact Surfaces, Engineered Stone, Granite, Marble, Glass;

Wet use only;