Get the job done with ease using these 2pcs 6542 High-speed Steel Twist Drill Bits. Made from high-quality 6542 HSS steel, these drill bits are tough, durable, and resistant to breakage. The black oxide surface treatment provides excellent rust resistance for long-lasting durability. With a spiral groove design, these drill bits prevent displacement during use and facilitate quick and easy debris removal. The sharp cutting edges ensure smooth cutting without any burrs. These twist drill bits are suitable for use with electric drills, hand electric drills, and impact electric drills. They can be used for drilling stainless steel, iron, copper, aluminum alloy, wood, and plastic. To ensure clean and accurate holes, it is recommended to use water for lubrication and cooling during metal drilling. Control the feed speed and handle the drill bit gently to prolong its lifespan.