For stone, glass and plated materials, these diamond twist drills clean out better than regular diamond drills
recommended speed 5000 - 30.000 rpm
Made in Switzerland.

Ideal for reaming beads and for drilling smaller holes in stone, glass, metal and ceramic, this core drill is hollow all the way through the shaft, so it drills faster with less clogging. Nickel-plated with 180-grit industrial diamonds. Shanks vary with head size.
Length:35mm