Ingco 4 mm HSS Twist Drill Bit Set – 10‑Piece High-Speed Steel for Metal, Wood & Plastic

This Ingco 4 mm HSS Drill Bit Set includes ten identical, precision-engineered high-speed steel bits. Each bit measures 75 mm in total length, with a usable working length of 43 mm, and is designed for clean, efficient drilling in a variety of materials—metal, wood, and plastic. The durable HSS construction ensures long-lasting sharpness and heat resistance. Perfect for DIY enthusiasts, craftsmen, and professional workshops, this set provides consistent results and convenient organization in a compact poly bag. 



General/Technical Specifications

• Quantity: 10 bits per pack
• Diameter: 4 mm (0.157″)
• Total Length: 75 mm
• Usable (Cutting) Length: 43 mm
• Material: High-Speed Steel (HSS)
• Packaging: Poly bag with hanger slot and resealable closure
• Shank Type: Straight cylindrical for standard drill chucks
• Point Angle: ~118°, optimized for versatile drilling
• Heat Resistance: HSS tolerates high drilling temperatures without losing hardness
• Finish: Bright polished for easy chip removal and reduced friction