HSS Step Drill Bit, Double Slot Countersink Step Drill Bit (5mm-35mm) with Titanium Coating, Solid, Perfect for Screwdriver Drilling on Steel, Wood, Brass, Aluminum, PVC（Round rod, 13 mm）

Perfect Size: For precise drilling of various sizes from 5-35mm in diameter, one drill can handle holes of various sizes. High-Quality Material: The titanium alloy coating is made of high-quality HSS, which can ensure extremely high durability and reduce friction and heat. Titanium alloy drill bits are especially suitable for processing thin copper and aluminum parts / iron plates / wood panels / plastic plates and other thin plate materials. Easy to Drill: The marking hole position and double flute design make drilling faster and smoother, as well as precise drilling. Laser Cut: The dimensions are laser engraved into the metal so they will not wear out even after repeated use. Applicable Materials: Plastic, Wood, Copper, Iron，fiberglass, PVC, metal fin and aluminum。（≤3mm）