M35 step drill bit in high-speed steel 4-32 mm, tapered bottom drill bit set, cobalt alloy helical point reamer, cobalt triangular shank, countersink bit

Superior Hardness: M35 high-speed steel provides superior durability compared to other drill bits, while the cobalt alloy allows for easy drilling through steel, aluminum, copper, plastic, wood, and many other types of thin sheet metal. Optimal Design: The triangular shank securely attaches to the power tool chuck, preventing slippage. The double-edged design removes burrs more quickly and facilitates chip evacuation. The drill bit's forked tip increases drilling speed and automatically removes burrs during drilling, keeping the bit clean. Water cooling is available during operation, extending its lifespan. An Essential Tool for Homeowners, DIYers, and Professionals: Ideal for household repairs and light-duty work, such as drilling holes in plastic, aluminum, copper, and many other types of thin sheet metal, including stainless steel and steel plates. Quantity: 1 drill bit, 4 to 32 mm.