[High Quality]Crafted from quenching high-speed steel with titanium plating, our twist drill bits feature hardened and honed cutting edges for exceptional sharpness and durability. With a chatter-free design, they offer excellent toughness, high hardness, and rust resistance, ensuring they 't easily break. [Versatile Set]This set includes 10 drill bits in various sizes, ranging from 0.6mm to 2.2mm in diameter. Each size is represented with one piece, meeting a diverse range of drilling needs. [High Efficiency]The fully ground spiral groove design swiftly clears particles, reducing friction and heat for faster and cooler drilling. The straight shank prevents walking, ensuring precise drilling and greatly improving work efficiency. [Easy to Use]Featuring a uniform handle diameter of 2.35mm, our drill bits offer convenient clamping. The large chip removal space allows for easy and quick chip removal. When drilling holes, it's essential to release the foam to prevent bursting due to powder blockage. [Wide Application]Compact and , our drill bits are compatible with pin vises, electric and cordless power drills, and rotary drills. Suitable for drilling and engraving materials such as jewelry, amber, beads, beeswax, resin, circuit boards, leather, wood, olive, walnut and more. Colour:As Shown Material:high speed steel Package Contents: 1 set x drill bit case Only the above package content, other products are not included. Note: Light reflection 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.