This is 50pcs 1.0mm-3.0mm titanium coated HSS twist drill bits set. Great for drilling wood, plastic, etc. High-speed steel, high quality with good durability. Fast and clean drilling with maximum surface quality. Features: High speed steel twist drill bit set for wood, plank, plastic. Perfect for DIY, home use and general building / engineering using. Provide safe drilling start without pre-punching. Drill hole quickly and nicely with straight round shank. Include 5 sizes of drill bits(1.0mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm) to meet your different needs perfectly. Specifications: Material: High-speed Steel (HSS4241) Surface Treatment: Titanium Coated Hardness: HRC 60-62 Containing Sizes: 1.0mm, 1.5mm, 2.0mm, 2.5mm, 3.0mm Quantity: 1 Set (50pcs) Size Quantity(pc) Length 1.0mm 10pcs 35mm 1.5mm 10pcs 40mm 2.0mm 10pcs 50mm 2.5mm 10pcs 55mm 3.0mm 10pcs 60mm Package Weight: Approx. 54g / 1.9oz Package Size: Approx. 7 * 5 * 1.5cm / 2.8 * 2.0 * 0.6in Package List: 50 * Twist Drill Bit