Efficient Punch Tool Diamonds Brazed Dry Drilling Bit for Accurate Drilling Tasks 5-16mm Diameter Bit Hexagonal Shanks

6.35mm hex shank design, fit for most drill chuck. Wax inside for cooling, Dry drilling without water. Very high efficiency, multi-purpose drilling. Efficient Punch Tool Diamonds Brazed Dry Drilling Bit for Accurate Drilling Tasks 5-16mm Diameter Bit Hexagonal Shanks. Features: 6.35mm hex shank design, fit for most drill chuck. Wax inside for cooling, Dry drilling without water. Very high efficiency, multi-purpose drilling. Long life drilling. For drilling granite marble, masonry, concrete, tile/ceramic, glass, hard plastic. Specifications: Component: Diamonds Drill Bit. Option Diameter Size: Approx. 5mm/0.2inch, 6mm/0.24inch, 8mm/0.32inch, 10mm/0.39inch, 12mm/0.47inch, 14mm/0.55inch, 16mm/0.63inch, Overall length: 65mm/2.56inch. Hex Shank: 6.35mm/1/4inch. Package Includes: 1pc Dry Drilling Bit. note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color