Specification Brand : Fafeicy BulletPoint1 : [4 Piece Set] : Includes 4 pieces of 1/4 inch (6, 8, 10, 12 mm) hex shank drill bits, offering versatility in usage and providing a secure grip for different drilling applications. BulletPoint2 : [Unique Eccentric Design] : The eccentric m35 bit design easily penetrates various materials, while the u-shaped spiral prevents chip accumulation and retention, enhancing drilling efficiency. BulletPoint3 : [Convenient and Efficient] : Designed for compatibility with electric drills and bench drills, these high-strength drill bits are convenient to use and ensure high efficiency in a variety of drilling tasks. BulletPoint4 : [High Strength M35 Carbide] : Crafted from m35 carbide, these drill bits ensure efficient and stable drilling for deep, angled, blind holes, with exceptional durability and to erosion and deformation. BulletPoint5 : [Versatile Materials] : Suitable for stone, concrete, wood, steel, brick walls, plastic, tiles, and marble, these drill bits are versatile for a wide range of construction tasks. Color : Silver Black ItemName : 4Pcs Eccentric Drill Bit Set, Eccentric Drill Bit 150mm 6.35mm Hex Shank Drill Bit Set for Concrete Masonry Glass ItemPackageDimensions_Height : 2 centimeters ItemPackageDimensions_Length : 12 centimeters ItemPackageDimensions_Width : 5 centimeters ItemTypeKeyword : extra-long-drill-bits Manufacturer : Fafeicy ModelNumber : Fafeicykpmgz4ar1o NumberOfItems : 1 PackageLevel : unit PartNumber : Fafeicykpmgz4ar1o ProductDescription : Specification: Item Type: Eccentric Drill Bit Set Material: Cemented Carbide M35 Size: Approx. 6mm / 0.24in, 8mm / 0.31in, 10mm / 0.39in, 12mm / 0.47in Total Length: Approx. 150mm / 5.91in Hex Shank: 6.35mm (1/4 inch) Compatible with: Hand Drill, Electric Drill, Table Drill Application: for various common ceramic tiles, antique tiles, foam bricks, all kinds of wood.