🔩 Stainless Cobalt Titanium Aluminum Plastic Review

【HSS & Titanium Coating】- The step drill bit is made of superior high-speed steel(M2), titanium coated surface, outstanding durability and sharpness. Effectively reduces the friction to ensure cooler running so as to prolongs service life. 【50 Sizes in 5 Pcs】- The step cone drill bit set includes five standard step drill bits which can replace 50 individual drill bits, Two-flute design gives you faster, smoother cutting. 3-sided (TRI-FLAT) shank will not slip in your drill's chuck;Cobalt coated for smoother cooler cutting. 135° SPLIT POINT TIP AND TWO-FLUTE DESIGN: increases cutting speed with self-centering and prevents walking, clears chips faster and allows particles to escape easily. Convenient: Self-centering features prevent slipping and increase cutting speed. Workable diameters are marked in the drill. It is very convenient for you to choose workable size. Portable-coming with an aluminum carrying case. For DIY lover. Widely application: The step drill bits can be used to chamfer, bur, and drill or enlarge holes. The step drill bits can work with aluminum alloy, plastic material and wood,soft metal(Not recommended for Metal and Stainless Steel).