General description The FLITI 120pcs Twist Drill Bits set includes high-speed steel (HSS) drill bits with a durable titanium surface treatment. This set features six different diameters (1.5mm, 2mm, 2.5mm, 3mm, and 3.5mm), with 20 pieces of each size, making it ideal for various drilling needs in DIY, craft projects, and general construction applications. Technical specifications Material: High-speed steel (HSS) with titanium surface treatment Sizes: 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm Quantity: 120 pieces (20 pieces per size) Usage Suitable for drilling into aluminum, iron, wood, and plastic Ideal for DIY projects, craft work, and general construction tasks