Titanium HSS Step Drill Bit Set with Center Punch

• Set includes three Titanium-coated High-Speed Steel (HSS) step drill bits: 4-12mm, 4-20mm, and 4-32mm. • Titanium coating enhances wear resistance, heat resistance, and extends tool life for drilling various materials. • Spring-loaded automatic center punch included for accurate marking and preventing bit slippage. • Compatible with most standard drill drivers, including gun drills and bench drills. • Recommended to use water or coolant during drilling to reduce friction and prolong tool life. • Suitable for drilling clean holes in sheet metal and other materials.