Feature●✅Four Spiral Flute design ensures precise and accurate drilling. The four-flute step drill bit is smoother cutting than conventional two-straight flute step drills.●✅Constructed with HSS material ensures they stay sharp and sturdy through various projects. Surface Nitride Coating can keep sharp and prolong service life.●✅5PCS different sizes/levels of step bits that youll appreciate the versatility and convenience they bring to your drilling tasks. Say goodbye to the hassle of switching between multiple bits.●✅Having a solid case to keep the bits nice and sharp vs just rolling around with other metal bits. Very versatile, do-it-all kit.●✅If youre going for smooth and efficient these will blow through most Stainless Steel/Metal Sheet/Wood/Plastic/Aluminum Sheet/Copper and other metal sheets at high speed like butter.●✅Whether youre working on a big project or a quick fix, our step drill bits are your go-to tools. MABLEVI will repair and replace any defect, without charge, and without waiting.Description