Feature:1. Made of stainless steel Ti coating material, strong and durable, high hardness and wear resistance2. Wide application range, suitable for drilling holes in wood, plastic and aluminum.3. Good choice for DIY, home and general construction, engineering use.4. With storage box, there are standard model sizes in the box, which is compact and easy to carry and distinguish.5. The package contains different sizes of twist drill bits, which can meet your different needsSpecification:Item Type: Twist Drill Bit Set20 Kinds of Drill Bits:20 x 1.0mm, 20 x 1.5mm, 20 x 2.0mm20 x 2.5mm, 20 x 3.0mm, 20 x 3.5mm15 x 4.0mm, 10 x 4.5mm, 10 x 5.0mm10 x 5.5mm, 10 x 6.0mm, 4 x 6.5mm4 x 7.0mm, 3 x 7.5mm, 4 x 8.0mm3 x 8.5mm, 3 x 9.0mm, 3 x 9.5mm2 x 10.0mm, 1 x 13.0mmSize: Approx. 1mm / 0.04in1.5mm / 0.06in2mm / 0.08in2.5mm / 0.1in3mm / 0.12in3.5mm / 0.14in4mm / 0.16in4.5mm / 0.18in5mm / 0.2in5.5mm / 0.22in6mm / 0.24in6.5mm / 0.26in7mm / 0.28in7.5mm / 0.3in8mm / 0.31in8.5mm / 0.33in9mm / 0.35in9.5mm / 0.37in10mm / 0.4in13mm / 0.5inSize: Approx. 25 x 35cm / 9.8 x 13.8in.Package List:202 x Twist Drill1 x Storage Box