ITEM NAME:6Pcs Ceramic Tile Glass Drill Bits 1/4" Hex Shank Set for Chucks Bit Holder OZ Specification: Brand new Material: 45#Steel Alloy Head Finish Treatment: Titanium Shank: 1/4 hex shank Drilling Diameter: Approx. 4,5,6,8,10,12 mm/ 0.16,0.20,0.24,0.31,0.39,0.47 inch Applicable scope: Suitable for boring holes in the glass,ceramic and ceramic tiles. Package Included: 6 * Glass Drill Bits Note: Please allow minor deviation due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item..Shank: 1/4 hex shank. 6 Glass Drill Bits. Applicable scope: Suitable for boring holes in the glass,ceramic and ceramic tiles. Due to the difference between different monitors, the picture may not reflect the actual color of the item.