[High Quality] Made of hard alloy, this glass tip has excellent abrasion resistance and extreme hardness for longer life, titanium coated surface is anti-oxidant and will not fade . [6 sizes] Drill bit for glass with 5 different sizes: 3mm, 4mm, 5mm, 6mm, 7mm,all with 1/4inch hex bit fits various tasks perfectly, this drill is marked with dimensions. [Precise hole and smooth] Excellent for making clean, precise holes in glass and tile. The fine edge and the hole are smooth and complete, without burrs. [Sturdy and durable] Hex shank glass drilling tools are fast and fast. The use of water lubrication will greatly prolong the life of the tip. [Wide Application] Essential for DIY and home enthusiasts to drill ceramic mirrors with ceramic tiles. glass and other rigid and fragile work surfaces. Specifications: As shown Color: Gold Quantity delivered: 5 pieces