Irwin Turbomax HSS Drill Bit

The 4mm Irwin Turbomax HSS Drill Bit measures 4.0 x 75mm, providing a popular mid-range size for a wide variety of drilling applications. This diameter is commonly used for standard bolts, larger screws, and general metalworking tasks where a reliable, clean hole is essential. Engineered for use with portable and cordless drills, this bit is primarily designed for metal and sheet metal drilling, whilst also excelling in all types of wood and plastics. The 75mm length offers good reach for typical drilling operations across various materials and thicknesses. It can be used for drilling stainless steel, though a coolant should always be applied for best results and extended bit life.