EZARC M35 Cobalt Step Drill Bit for Metal, 1/4"-3/4", 1/4" Hex Shank

C-Profile DesignEZARC step drill bits feature a triple-flute design for increased stability, effectively reducing deviation during the cutting process. Additionally, the 'C-profile' cutting edge ensures smoother cutting and an increased cutting speed, M35 HSS Step DrillM35 cobalt high-speed steel, through heat treatment, achieves toughness and bending strength that surpass standard high-speed steel, making this step drill bit more suitable for cutting hard materials, AlTiN CoatingStep bits coated with aluminum titanium nitride, rated at 89HRC for exceptional hardness and thermal properties. This coating offers superior resistance to heat, wear, and corrosion, with high adhesion and low friction, Nine Step SizesSpiral flute design, featuring nine distinct steps, offers seamless and effective drilling across various thicknesses, eliminating the need for multiple bits. Includes 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", Please NoteMaterial thickness: Suitable for metal sheet up to 1/8" (3 mmthick and stainless steel sheet up to 1 mm thick. For continuous operation, add cutting oil or coolant before use. Due to the larger cutting angles, the startup speed may be slower.