Accurato 5pcs HSS Titanium Coated Step Drill Bits Set and Automatic Center Punch 50 Sizes High Speed Steel Stepped Up Drill Bits with Aluminum Storage Case

HSS Step Bit Drill Bit Kit Features: 1. SUPER-HARD MATERIAL: 5-piece stepped up drill bits are made from high speed steel with titanium coating to be durable to drill holes in aluminum alloy, copper, plastic, stainless steel, wood and other types of sheet metal less than 0.2" in thickness. 2. 50 SIZES IN 5 PIECES: Accurato titanium coated step drill bit kit comes with totally 50 sizes so you can drill up to 50 holes with different diameters, compatible with 1/4" and 3/8" chuck sizes, saving your time and efforts to change bits. 3. X-SHAPED SPLIT POINT & TRI-FLATTED SHANK: This metal step drill bit features two-fluted design with a 118° split point tip, which allows for fast and accurate drilling; Three flat-side cutouts are designed for a stronger and better grip on a standard drill chuck, also prevent the drill bit from slipping while working at a high speed. 4. AUTOMATIC CENTER PUNCH: The center punch is made of a finished brass body with knurled surface for better gripping, delivering an automatic, high-impact, spring-loaded strike through adjusting the cap; and the carbide tipped bit makes the center punch 10 times stronger than normal one. 5. WHAT YOU GET: 1- 6-step drill bit (3/16", 1/4", 5/16", 3/8", 7/16", 1/2"); 1- 9-step drill bit (1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4"); 1- 10-step drill bit (1/4", 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1-1/8", 1-1/4", 1-3/8"); 1- 12-step drill bit (3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8"); 1- 13-step drill bit (1/8", 5/32", 3/16", 7/32", 1/4", 9/32", 5/16", 11/32", 3/8", 13/32", 7/16", 15/32", 1/2"); 1- automatic center punch; 1- aluminum storage case and our friendly customer service.