PERFECT SIZE: For precise drilling of various sizes from 5mm to 35mm in diameter, one drill can handle all hole sizes. Premium Materials: Classic high speed steel with titanium coating for proven performance and durability when drilling in plastic, wood, aluminum, copper, stainless steel and many other types of sheets.Titanium alloy drill bits are especially suitable for processing metal materials such as copper and aluminum parts/die steel/spring steel/cast iron parts/iron. Laser Engraved: The dimensions are laser etched into the metal so they won't wear out even with repeated use, easy to drill with precision. > Easy to Drill: Marked hole positions and double groove design make drilling faster and smoother, more accurate. Precise Positioning Drill: It produces automatic, high-impact, spring-loaded impact force when pressed against a surface, and the adjustable hood allows you to adjust the impact force. The knurled surface of the high speed steel body is very non-slip, Provides precise positioning points without worrying about misalignment. Features: There is no need to use a center punch and it is less likely to break than regular drills. Automatically drills as you drill with only a small amount of pressure. Provides a fast, smooth and clean cut, with each step clearly marked with a depth diameter. Specifications: Material: Titanium Plated HSS Shank Type: Round Shank Color: Silver Model: 5-35mm Stem Diameter: 13mm Aperture: 5mm, 7mm, 10mm, 12mm, 15mm, 17mm, 20mm, 22mm, 25mm, 27mm, 30mm, 32mm, 35mm (13 pitch) Length : approx. 7.2cm;