New one box set of assorted 30 pieces Titanium coated Diamond rotary burrs / points (TYPE 2).
We are used HR2 type diamond sands on those burrs. Better quality and cut faster than the ordinary one.
Titanium coating can improve the harden of the steel. Durable than electric zinc type.
* They will fit your hand drill, drill press & your Dremel® and Foredom® tool with a 1/8" collet.
* Overall length is 40mm to 50mm (1 5/8 inch to 2 inch)
* Shank diameter : 3mm