UHAPEER Step Drill Bit Set Titanium High Speed Steel 5-Piece 50 Sizes with Automatic Center Punch Multiple Holes Stepped Up Bits in Aluminum Case

Package Include: 5 x HSS Step Drill Bits 1 x Automatic Center Punch 1 x Aluminum Case Specifications: Main Material of Bits: High Speed Steel (HSS 4241) Surface Treatment: Titanium Coating Shank Design: 3-Sided Shank Tip Angle: 118 Degree X-shape Suitable for the hardness of below 25HRC parts. Measurement: 3/16" to 1/2" 6 Steps (3/16, 1/4, 5/16, 3/8, 7/16, 1/2? 1/8" to 1/2" 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) 1/4" to 3/4" 9 Steps (1/4, 5/16, 3/8, 7/16, 1/2, 9/16, 5/8, 11/16, 3/4) 3/16" to 7/8" 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) 1/4" to 1-3/8" 10 Steps (1/4, 3/8, 1/2, 5/8, 3/4, 7/8, 1, 1-1/8, 1-1/4, 1-3/8) Features: Assorted Bits Set: The set includes five standard step drill bits, in total 50 sizes, replacing individual bits, saving you time and efforts. HSS( High speed steel): HSS Material can withstand higher temperatures without losing its hardness and toughness, this property allows HSS to cut faster than high carbon steel. Titanium Coating: The titanium coating resists the drill bits from heat, corrosion and rust,  reducing friction, making it easily to drill multiple holes on soft metal materials (like iron plate, copper plate, aluminum plate), wood and plastic materials sheets. Laser Measurements Scale: The step up drill bits comes with visible laser measurements for you to easily identify the size you want.