These are nice variety of teeny tiny drill bits. Comes with a neat design storage case, which is convenient to carry.<br><br><strong>Features:</strong><br>Excellent workmanship, stable performance and durable.<br>High-speed steel, high quality, performed well in cutting and drilling.<br>Comes with a high quality storage box, twist drills in every sizes have their own slot.<br>It includes 20 sizes(0.3-1.6mm) in one drill bit set, which meet your different needs perfectly.<br>Suitable for drilling hole of the thin plate, wood plastic or circuit boards that in low hardness.<br>It also can be used in the maintenance of electronic products, household products repair, DIY and more.<br><br>Twist Drill Model:<br>0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, 0.55mm, 0.6mm, 0.65mm, 0.7mm, 0.75mm,<br>0.8mm, 0.85mm, 0.9mm, 0.95mm, 1.0mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm.<br><br><strong>Specifications:</strong><br>Material: High-speed steel<br>Package Weight: Approx. 35g / 1.25oz<br>Package Size: Approx. 16 * 8.7 * 1cm / 6.30 * 3.43 * 0.39in<br><br><strong>Package List:</strong><br>20 * Twist Drill<br>1 * Storage Case<br><br><strong>Note:</strong><br>This twist drill bits are not suitable for high hardness materials(such as stainless steel, metal).