Detail Rock Drill Bit Set of 15Pcs Tungsten Carbide Tip Twist Drill Bits for Porcelain Ceramic Tile Concrete (3-16mm)[9 Sizes]-These drill bits have 9 different sizes (3, 4, 5, 6, 8, 10, 12, 14, 16mm), 3 flat shanks, very suitable for different drilling tasks, with very high drilling accuracy. The rotary thread design makes drilling and chip removal smoother. [Premium Material]-Carbide drill bits are durable and have a longer lifespan than the steel drill bits you usually use. [Superior Performance]-Tungsten carbide drill bit is sharp and easy to set. Drilling is stable and fast, without breaking the boundary, and the holes are neat and smooth. [U-type Socket Design]--The U-shaped groove design has fast drilling and dust removal, and the triangular chuck design makes the operation more stable. [Widely Used]-The heavy-duty tungsten carbide cutter with pointed tip can easily penetrate into a variety of materials, such as brick, concrete, glass, mirror, plastic masonry, and wood. Features:Item Name: 15pcs Tungsten Carbide Drill Bit Tip Suitable for: brick, concrete, glass, mirror, plastic masonry and wood. Color: BlackMaterial: CarbidePackage Contents:2x3mm Drill Bit2x4mm Drill Bit2x5mm Drill Bit2x6mm Drill Bit 2x8mm2x10mm Drill Bit 1x12mm Drill Bit 1x14mm Drill Bit 1x16mm Drill Bit Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement error is +/- 1-3cm.