Automatic Center Punch: Automatic center punch provides automatic, high-impact, spring-loaded impact on the cap; Its brass body has a deeply knurled surface for non-slip control. Protective aluminum case provides convenient storage and transportation. Dual Cutting Blades and Trilateral Shafts: Double cutting blades and X-shaped opening design ensure cutting faster and more uniform; 3-sided shank design prevents the chuck from slipping; with minimal pressure, the set can cut through wood, sheet metal, steel and other surfaces. HSS & TITANIUM COATING: High speed steel makes the step drill bit set more durable and the titanium coating can easily cut steel, aluminum, copper, plastic and wood and many other types of sheet metal. TIME SAVING: Covering a variety of pitch sizes, you can drill or enlarge different holes without constantly changing the BIT. The dimensions are laser etched into the metal so they can be drilled with precision and won't wear out even with prolonged use. Set of 5 titanium coated hollow drill bits, large set of step drill bits, HSS, spiral If you need a very satisfying stepper bit stop, this is what you need. The bit stepped is made of HSS high speed steel, coated with titanium alloy and durable. Ideal for drilling holes in various materials such as steel, brass, wood, plastic, sheet metal, aluminum, insulation board, PVC board, etc. Widely used and relevant p> Compatible models, bench drill, hand drill, rechargeable drill. < p>Tapered to drill larger, deeper holes or widen openings in drilled areas. Knife blade design for faster cuts and automatic deburring when pe grinding. feature Double-edged design for faster, smoother cuts High-speed steel for longer life Changeable hex shank quick for easy installation. A drill can drill holes of different sizes advantage: 1. Use twist drill - Stepped drilling is used for pre-drilling to reduce damage to the drill piece during drilling. 2. CNC machine tools, each process is strictly controlled, and each step is subject to quality control. 3. Compared with twist drill bits, step drill bits are not easy to break and can drill holes of different sizes. Two-blade design: Better chip evacuation and faster drilling . Increase your productivity. X-shaped opening design for easy removal of chips when drilling. Attractive and functional design Home improvement and general building technology/surveillance. An attractive aluminum case collects the drill and provides the necessary kit. Duration The center punch is made of impact-resistant alloy steel for easy positioning before drilling and breaking the glass. Position and drill holes to protect the taper bits.