10PC Diamond Round Ball Burr Drill Bit Set For Carving Engraving Drilling 4-12mm

Description: 1. Cylindrical tip diamond coated head. 2. Can be installed on the electronic grinder hanging grinder and hand electric drill. 3. Used for sculpting dressing grinding and internal grinding carbide in ceramics glass gemstones alloy and many other abrasive materials. Specification: Material: Metal Diamond. Shape: Round Ball Shape. Shank Diameter: 3mm(0.08inch). Head Diameter:4/5/6/8/10/12mm Color: Silver Tone. Length:33-40mm Quantity:10pcs Package Includes:(the size is up to you) 10pcs Grinding Needle Head Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. 2. Please allow slight manual measurement deviation for the data.