General description A set of 25 general purpose TiN (titanium nitride) coated HSS standard twist drill bits ranging from 1mm to 13mm, ideal for use on softer metals, wood, and plastic. The TiN coating extends the drill bit life and allows for faster operation compared to standard HSS drill bits. Technical specifications Material: TiN coated high speed steel Point type: 118° point Sizes included: 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, 10mm, 10.5mm, 11mm, 11.5mm, 12mm, 12.5mm, 13mm Standard: DIN 338 Usage Suitable for general purpose applications, including drilling into copper, iron, magnesium, mild steel, wood, and plastic.