<p>1. Those Screwdriver Bits are made of S2 alloy steel which is anti-impact and tough, great wear .</p> <p>2. Magnetic, good workmanship, high precision. each edge can be accurately locked screws, no damage to the screw and the screwdriver head.</p> <p>3. Accessible: Case container bit retention system keeps bits secure, labeled bit slots help keep your tools organized.</p> <p>Treatment: Heat treatment nickel plating, prevent rust.</p> <p>Shank: 1\/4 inch hex shank 6.35mm.(Can use it manually or use it for cordless screwdrivers)</p> <p>Length: 100mm</p> <p>Use: You can use it for home, auto repair, electrical repair, electronic product repair, machine repair, etc.</p> <p> treatment: nickel plating</p> <p>Specification: : T8, T10, T15, T20, T25, T27, T30, T40</p> <p>Square head batch: 1.0, 2.0, 2.5, 2.7, 3.0, 4.0, 5.0</p> <p> batch: 3.0PH0, 3.0PH1, 4.0PH1, 4.5PH1, 4.0PH2, 4.5PH2, 5.0PH2, 6.0PH2</p> <p>One word batch: 1.6, 2.0, 2.5, 3.0, 4.0, 5.0, 6.0</p> <p>Color: As Shown</p> <p>Material: S2 alloy steel</p> <p>Package Contents:</p> <p>1 * Bit storage bag</p> <p>30 * Bits</p> <p>Only the above package content, other products are not included.</p> <p>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.</p>