GOLDEN CORE DIAMOND DRILL BITS. For Drilling in Marble, Limestone.Sandstone, Granite, Concrete. High Production, fast drill and extended life with economical purpose. Wet cutting and dry cutting. Water circluation around inside the drill bits helps lengthen the life of your drill bits and reduce cracking or bursting. The V nut in the foot enables a self-centering effect, Machine:- Drill Machine Or Angle Grinder.

GOLDEN CORE DIAMOND DRILL BITS. For Drilling in Marble, Limestone.Sandstone, Granite, Concrete. High Production, fast drill and extended life with economical purpose. Wet cutting and dry cutting. Water circluation around inside the drill bits helps lengthen the life of your drill bits and reduce cracking or bursting. The V nut in the foot enables a self-centering effect, Machine:- Drill Machine Or Angle Grinder.