Features: Forstner bits crafted from metal for superior strength, hardness, wear, and heat resistance, with a painted surface to enhance rust and corrosion resistance. A spike design for precise wood drilling, preventing slippage and ensuring accurate hole starts. The head's 2 flutes, 3 spurs, and arc curve design reduce cutting resistance, increase efficiency, and expedite debris removal. Heat-treated bits that can be resharpened for extended use, producing clean, smooth, and burr-free holes. These metric forstner bits are ideal for boring holes in solid wood, cork, hardwood, plywood, medium-density fiberboard, particleboard, and even plastics, rubber, and other materials. They are compatible with a variety of drills, including handheld, bench, vertical, and CNC engraving machines, thanks to their standard shank diameter. Not suitable for metalwork. Materials should be secured during cutting, with the bit perpendicular to the surface. For hardwood processing, water, oil, or lubricant can be applied to enhance drilling precision and quality. Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Size: As picture show Quantity: 5pcs Accessories: 1 Storage Case, 2 Wrench Package List: 1 Set Forstner Drill Bit Set