It is a Drill Bits Air Screw Driver set for work in wood, which is practical and friendly tool for electrician. Easily switch between bits in seconds.<br/>Features:<br />Set of 20pcs chrome-vanadium steel Screwdriver Bits kit, which is practical and has long service life.<br />Insert-typed swivel head flips 180° and locks from drilling to driving, and easily switch between bits in seconds.<br />Universal 6.35mm hexagonal shank clamp ability is more stable and tightly.<br />Works with your own power drill, suitable for hole opening, chamfering, hole machining operations, screw tightening, etc.<br />Well packed and assorted in a plastic box for convenient access and storage.<br/>Specifications:<br />Color: Silver<br />Material: Chrome-vanadium steel <br />Set Include:<br />1 Half Time Drill Driver<br />8 Phillips Bits ( 2 each: PH0, PH1, PH2, PH3 )<br />8 Flathead Bits ( 2 each: 1/8&#39;&#39;, 5/32&#39;&#39;, 3/16&#39;&#39;, 1/4&#39;&#39; )<br />2 Countersink Bits ( 3/32&#39;&#39; 2.4mm, 1/8 3.2mm )<br />1 Allen Wrench<br />Half Time Drill Driver Size: Approx. 14.6 * 1.7cm / 5.7 * 0.6in<br />Flathead Bits Length: Approx. 5cm / 1.9in<br />Package Size: Approx. 19 * 7 * 4cm / 7.4 * 2.7 * 1.5in<br />Package Weight: Approx. 370g / 13oz<br/>Package List:<br />1 * Drill Driver Bit Holder<br />8 * Phillips Bits<br />8 * Flathead Bits<br />2 * Countersink Bits<br />1 * Hex Socket Wrench<br />1 * Storage Box<br />