EZARC M35 Cobalt Step Drill Bit Set, 3PCS 1/8"-7/8", 1/4" Hex Shank | AlTiN Coating,C-Profile Edge,Triple and Spiral Flute, for Metal, Stainless Steel, Aluminum,Plastic, Storage Case

【C-Profile Design】EZARC 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 Drill】M35 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 Coating】Step 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

【3 Pcs Step Drill Bit Set】 The step drill bits are neatly organized in a compact case for easy transportation and storage. The spiral flutes and stepped design of the drill bits allow for seamless and efficient drilling through various thicknesses.

【Please Note】Material thickness. Suitable for metal sheet up to 1/8" (3 mm) thick 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