Perfect Size: For precise drilling of different sizes of 5-35mm in diameter, a drill can handle holes of different sizes. High Quality Materials: Made of high quality HSS, the titanium coating ensures extreme durability, reduces friction and heat. The titanium drill bit is particularly suitable for processing copper and aluminum parts / cast steel / spring steel / cast iron parts / iron and other metallic materials. Easy to Drill: Marking hole position and double flute design make drilling faster and smoother, as well as precise drilling. Laser Size: The dimensions are laser etched into the metal so that they will not wear out even after repeated use. Applicable materials: steel, brass, plastic, wood, copper, fiberglass, PVC, metal fin and aluminum. Every electrician / handyman deserves it It is made from high quality HSS steel Pierce hard objects, easily like cutting butters HSS steel It is a complex steel, containing tungsten, molybdenum, chromium, vanadium, cobalt and other carbide elements It maintains high hardness to cut with high speed (around 500 ° c), and HRC> 60 Perfect size For precise drilling of different sizes from 5-35mm in diameter, a drill can handle holes of different sizes. Easy to drill Marking hole position and double flute design make drilling faster and smoother, as well as precise drilling Applicable materials steel, brass, plastic, wood, copper, fiberglass, PVC, metal fin and aluminum attention don't forget to protect your hands when using it. This product is not for sale to children.