Material: High-speed steel with titanium coating. The drill bits are smoothed and coated, these drill bits are smooth and sharp, HSS steel fast and durable. 6 different diameters to choose from, metal drill diameter: 1mm 1.5mm 2mm 2.5mm 3mm 3.5mm, 10 pieces of each size. Titanium coating improves the surface hardness of the bit, improves machining accuracy, improves the surface quality of the bit, reduces the friction coefficient when machining workpieces, and improves wear resistance.

Suitable for drilling holes in a variety of surfaces including aluminum, wood, and plastic, ideal for DIY, craft projects, and general construction/engineering purposes. Features: high-speed steel, durable. With titanium finish that helps them last longer. Pre-drilling prevents the wood from splintering before a screw is screwed in and makes it much smoother to add hardware. Holds pulley screw heads. Bits are usually stored in cases by size and it would be difficult to find the right drill. This makes it very easy to select the correct bit with calipers and we have checked the diameter before use. They are very useful in DIY work, craft projects, and general construction purposes. They can be used to drill holes in a variety of surfaces including metal, wood, and plastic. Sizes included: 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm size and quantity: 1.0mm: 10pcs 1.5mm: 10pcs 2.0mm: 10pcs 2.5mm: 10pcs 3.0mm: 10pcs 3.5mm: 10pcs Quantity: 1 set (60 pieces)