Hymnorq 10-Piece M35 Cobalt Steel Drill Bit Set for Metals - 4mm Diameter, Dual Twist Flute, 135° Split Point, Bronze Hue Finish, Straight Shank, Chamfered End, PP Plastic Case

Durable M35 Cobalt Steel Construction: Crafted from high-quality M35 grade cobalt steel with 5% cobalt content, these drill bits offer exceptional strength, heat resistance, and durability, making them ideal for drilling through tough metals, plastics, wood, and other materials. Efficient Dual Twist Flute Design: Featuring a dual twist flute, these drill bits provide faster chip removal, reducing friction and heat buildup for smoother, more efficient drilling. This design also enhances bit longevity, ensuring reliable performance over time. Precision 135° Split Point for Clean Holes: The 135° split point design minimizes walking and ensures accurate drilling, even in hard materials. This sharp point penetrates quickly, delivering cleaner holes with less effort, making your drilling tasks quicker and more precise. Chamfered Shank End and Straight Shank: The chamfered shank end ensures a secure fit in the drill chuck, preventing slipping or wobbling during use. The straight shank design further promotes stability, offering smooth operation and reduced vibration for consistent drilling results. Tough Transparent PP Plastic Storage Case: Keep your drill bits organized and easily accessible with the included transparent PP plastic case. The case is durable, compact, and ensures that each of the 10 bits remains safely stored, protecting them from damage while allowing you to quickly identify the right bit for the job.