Specification Brand : HUHAO BulletPoint1 : 【CARBIDE DRILL BIT】This eccentric twist drill bit set is made of carbide, which is hardened and thoroughly ground to make the tenon sharper, the surface is sharp and burr-free, and the polished surface makes threading smoother. It has the characteristics of wear resistance and durability, and can maintain good performance and stability during use. BulletPoint2 : 【UNIQUE DESIGN】With its skewed head eccentric drill design, this set provides more stable positioning and less resistance during drilling, resulting in better precision and a smoother drilling experience. The hexagonal handle design ensures tighter gripping, offering added safety while using the drill bits. Additionally, the precision ground drill tips prevent slippage and deflection, allowing for neat and accurate drilling. BulletPoint3 : 【High-strength Eccentric Twist Drill Bit】 Our high-strength eccentric twist drill bits are designed specifically for hand drills. They have accurate positioning and low resistance, effectively preventing drilling from slipping and deflecting. They can quickly drill holes in concrete walls, brick walls, and earthenware pots. For drilling glazed ceramics, thick rocks, and glass, adding water for cooling has a better effect. BulletPoint4 : 【Widely Applicable】The head eccentric drill masonry drills are widely used and can easily penetrate various materials such as tiles, glass, hard plastics, cement concrete, etc., and can be water-cooled for drilling. Its versatility makes it an essential tool for contractors, handymen, and DIY enthusiasts alike. BulletPoint5 : 【Drill Bit Size】The twist drill bits 8pcs set include 2pcs 1/4 "(6mm),2pcs 5/16" (8mm),2pcs 3/8 "(10mm), and 2pcs 1/2" (12mm) in various sizes to meet the needs of daily use, and the drill is hexagonal shank type, which is widely used and holds more firmly. Color : Silver ExternallyAssignedProductIdentifier1 : 0655222894342 ExternallyAssignedProductIdentifier2 : 655222894342 FinishType : Black Oxide GpsrSafetyAttestation : 1 IncludedComponents : No ItemName : HUHAO High Strength Bevel Special Eccentric Twist Drill Bit Set 8pcs, Carbide-Tipped Masonry Drill Bit for Stone/Glass/Marble/Tile/Wood(6mm+6mm+8mm+8mm+10mm+10mm+12mm+12mm) ItemPackageDimensions_Height : 0.25 inches ItemPackageDimensions_Length : 3.94 inches ItemPackageDimensions_Width : 0.25 inches ItemPackageQuantity : 2 ItemTypeKeyword : masonry-drill-bit-sets Manufacturer : HUHAO Material : Carbide ModelNumber : LWUS-DrillBit-2PCS-240316fa NumberOfFlutes : 2 NumberOfItems : 1 NumberOfPieces : 2 PartNumber : 08ZH24110408 ProductDescription : This grinding bit is made of stainless steel, which has excellent heat and corrosion resistance, and is covered with a sharply diamond particle coating that will not fall off or deform due to repeated use The round handle design of the rotary tool diamond grinding drill bit makes it suitable for most electronic grinders, engraving machines, hanging grinders and hand drills, which is very suitable for gemstone carving, molding repair, casting cleaning, rust removal and polishing, and DIY enthusiasts The multi-purpose tool diamond drill bit set is packaged in a sturdy plastic box for your convenience to carry and store The diamond drill bit set is very suitable for home decoration and handicrafts. It is a good helper for polishing, grinding, drilling, cutting, engraving and other operations, which can be engraved on various materials, such as tiles, ceramics, marble, stone, ceramics, agate, and even hard metals such as iron and silver Wear appropriate protective equipment when using to protect your eyes ; keep the workpiece and the grinding head stable during use to avoid excessive vibration and force; the operating speed is kept between 30000~50000RPM. Exceeding the maximum speed may cause the drill bit to jump, reduce the grinding effect, and even cause the rod to bend in severe cases