BAYTECH 6Pcs HSS Titanium Step Drill Bit Set with Automatic Center Punch 50 Sizes Double Cutting Blades Design for Sheet Metal Multiple Hole Stepped Up High Speed Steel Bits with Case

BAYTECH Titanium Step Drill Bit is made of high speed steel together will titanium coating , which lasts the bit a long using life. BAYTECH HSS Step Drill Bits 6 Pcs Set Bit 1 (10 steps): 1/4", 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1-1/8", 1-1/4", 1-3/8" Bit 2 (12 steps): 3/16", 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8" Bit 3 (13 steps): 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" Bit 4 (9 steps): 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4" Bit 5 (6 steps): 3/16", 1/4", 5/16", 3/8", 7/16", 1/2" Automatic Center Punch Portable Carry Case Feature 1. 118°opening design, effectively reduces the slip of the drill and more durable. 2. Flat shank design compatibility compatible with all major press drills and drills. 3. Two flute design provides faster,smoother and cleaner cut. X-type openings design to facilitate the removal of cutting waste when drilling; 4. High-speed steel with titanium coating provding durability in drilling rapid and smooth holes in steel,brass,alumium,wood and many other types of the metal sheet. Notice: 1. Always wear safety goggles and other appropriate safety items for protection but DO NOT wear gloves to prevent getting caught in the rotating part and injury to your hand. 2. If indicated any bend, crack on the shank or any unusual vibration when machine running. Please stop immediately to avoid any injury or damage.