A set of high quality HSS drill bit for drilling in wood, plastic and aluminum and copper.<br /><br />Features:<br />Quick change hexagonal shank.<br />Stable performance and durable.<br />High-speed steel with nitrogen treatment.<br />The most commonly used household twist drill set.<br />It includes 3 sizes(3mm, 4mm, 5mm ) in a twist drill set.<br /><br />Specifications:<br />Material: High-speed steel<br />Surface Treatment: Nitrogen treatment<br />Hexagonal Shank Diameter: 6.35mm / 0.25in<br />Package Weight: Approx. 203g / 7.17oz<br />Package Size: Approx. 13 * 6.5 * 1.5cm / 5.12 * 2.56 * 0.59in<br /><br />Package List:<br />15 * Twist Drill<br><img src="//agdetail.image-gmkt.com/m430/402/087/827087402/img/agdetail.image-gmkt.com/402/087/827087402/img/img.tomtop.com/product/xy/2000/2000/p/gu1/E/1/E1621/E1621-1-8976-lqvr.jpg" /><br>$$<img src="//agdetail.image-gmkt.com/m430/402/087/827087402/img/agdetail.image-gmkt.com/402/087/827087402/img/img.tomtop.com/product/xy/2000/2000/p/gu1/E/1/E1621/E1621-1-8976-9jz4.jpg" /><br>$$<img src="//agdetail.image-gmkt.com/m430/402/087/827087402/img/agdetail.image-gmkt.com/402/087/827087402/img/img.tomtop.com/product/xy/2000/2000/p/gu1/E/1/E1621/E1621-1-8976-SQIF.jpg" /><br>$$<img src="//agdetail.image-gmkt.com/m430/402/087/827087402/img/agdetail.image-gmkt.com/402/087/827087402/img/img.tomtop.com/product/xy/2000/2000/p/gu1/E/1/E1621/E1621-1-8976-QYjS.jpg" /><br>