The FletaPerfect Size: For precise drilling of different sizes from 5-35mm in diameter, one 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 especially suitable for processing copper and aluminum parts / cast steel / spring steel / cast iron parts / iron and other metal materials. Easy to Drill: The marking hole position and double flute design make drilling faster and smoother, as well as precise drilling. Laser Size: The dimensions are laser engraved into the metal so they will not wear out even after repeated use. Applicable Materials: Steel, brass, plastic, wood, copper, fiberglass, PVC, metal fin and aluminum. Every electrician/DIYer deserves it It is made from high quality HSS steel Drill through hard objects, easily like cutting butter Made of HSS steel It is a complex steel, containing tungsten, molybdenum, chromium, vanadium, cobalt and other carbide elements It maintains high hardness for cutting with high speed (about 500 C), and HRC> 60 Perfect size For precise drilling of different sizes from 5-35 mm in diameter, one drill can handle holes of different sizes. Easy to drill The 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 remember to protect your hands when using it. This product is not for sale to children.