[What you receive]you will get 10 pieces glass concrete drill bit set with 6 different sizes, this drill bit fits the majority of power drill currently on the market and come with a portable plastic case for easy storage and organization.[New upgrade materials]the masonry drill bits are made of YG6X alloy with anti-rust treatment, more sturdy and more reliable, anti-rust and wear-resistance; with a reinforced head and nice hardness prevent bit cracking, it can provide a longer life[Hexagonal handle for quick change]designed with 1/4 inches hex shank, the carbide tip drill bit can be applied to all power tools more easily and securely, which will drill faster and smoother, saving your time and efforts[Wide applications]tungsten carbide tip work with ceramic Tile, wall mirror, paver on concrete or brick wall the drill bit set can be applied to drilling glass, tile, ceramics, wood, marble, concrete, etc.;You should note that you have to remember to add water or coolant when drilling continuouslyColour:blackMaterial:CarbidePackage Contents:1X 5/32inch (4mm) Drill Bits2X 3/16inch(5mm) Drill Bits3X 1/4inch (6mm) Drill Bits2X 5/16inch(8mm) Drill Bits1X 3/8inch (10mm) Drill Bits1X 1/2inch(12mm) Drill BitsOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.