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 or 0.04in1.5mm or 0.06in2mm or 0.08in2.5mm or 0.1in3mm or 0.12in3.5mm or 0.14in4mm or 0.16in4.5mm or 0.18in5mm or 0.2in5.5mm or 0.22in6mm or 0.24in6.5mm or 0.26in7mm or 0.28in7.5mm or 0.3in8mm or 0.31in8.5mm or 0.33in9mm or 0.35in9.5mm or 0.37in10mm or 0.4in13mm or 0.5inSize: Approx. 25 x 35cm or 9.8 x 13.8in.Package List:202 x Twist Drill1 x Storage Box