Very excellent twist drill bit set that has 19 various sizes in a package, very practical and versatile for using.<br><br><strong>Features:</strong><br>Worked well in cutting and drilling.<br>Good quality high-speed steel material.<br>Excellent workmanship, stable performance and durable.<br>Suitable for drilling hole of the cast steel, alloy steel and gray cast iron, etc.<br>It includes 19 sizes(1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, 9.0, 9.5, 10.0mm) in one drill bit set.<br><br><strong>Specifications:</strong><br>Material: High speed steel<br>Surface Treatment: Black oxide finish / Plating titanium (Optional)<br>Package Weight: Approx. 315g / 11.12oz<br>Package Size: Approx. 17 * 10 * 1.5cm / 6.69 * 3.94 * 0.59in<br><br><strong>Package List:</strong><br>19 * Twist Drill