This set features six drills that are hollow all the way through the shaft to help them drill faster with less clogging. Ideal for reaming beads and drilling smaller holes in stone, glass, metal and ceramic, drills are nickel-plated and embedded with 180-grit industrial diamonds. Shank sizes vary with head size. This kit includes six diamond core drills, one of each diameter (OD): 1.0, 1.25, 1.5, 1.75, 2.0 and 2.5mm.
Drill dimension: 35.8mmL
Head length: 4.2mmL
• Drill size could vary slightly due to the size variation of the diamond particles.