Spark Step Drill Bit Set, 5PCS Four Spiral Flute Step Bits for Metal Auger Drill Bits  (Pack of 1)

【Four-Blade Precision for Effortless Drilling】step drill bit set features four sharp blades, ensuring fast and smooth drilling through steel, aluminum, copper, and other tough materials—like a hot knife through butter! 【Titanium-Coated HSS for Superior Durability】Made from high-speed steel (HSS) with a titanium coating, these bits offer exceptional hardness, faster cutting on hard materials, and resistance to high temperatures and cutting forces for long-lasting performance. 【50 Sizes for Versatile Drilling Needs】This 5-piece set covers a wide range of diameters, from 3/16" to 1-3/8", making it perfect for various drilling tasks, from small precision holes to larger openings. 【Quick-Release & Efficient Chip Removal】The 1/4" hex shank and quick-release slot ensure secure attachment and easy bit changes. The four-flute design effectively removes chips, reducing clogging and improving drilling efficiency. 【Organized Storage & Clear Markings】Includes a handy storage case for easy organization and portability. Each bit features clear size markings for quick identification, saving you time on the job. 【Friendly Reminder】Due to high-speed rotation, the temperature of the drill bit will rise. It is recommended to add cutting oil or spray water to cool the drill bit during continuous operation, which can effectively extend the service life of the step drill.