Features: 1.Can replace 50 single drills and process 23 holes with diameters ranging from 1/8" to 1-3/8" 2.Package includes 5 step drills, 1 automatic center punch and 1 aluminum storage box 3.Made of high-speed steel with high hardness, high wear resistance, easily cut metal, plastic, wood 4.Titanium coating can reduce surface friction, sharper and corrosion resistant 5.Double edge and X-shaped opening design, cutting more smoothly 6.Double spiral grooves reduce cutting resistance and remove chips more smoothly 7.Triangular shank design prevents the bit from slipping, for a variety of models 8.Automatic center punch, easy to mark the punching position Warm Tips: 1. Please do not set drilling speed too high to avoid damages to cutting edge Specifications: Item name: Step drill bit set Material: High speed steel with titanium coating Color: Golden Package size: 6 × 5.2 × 1.8 in Package weight: 1.2lb Step Drill Bit Size: #1: 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") #2: 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") #3: 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") #4: 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'') #5: 3/16" to 1/2" 6 steps (3/16'', 1/4'', 5/16", 3/8'', 7/16'', 1/2'') Package list: 5 x Step drill bit 1 x Automatic center punch 1 x Storage box Our products have been well d, you can rest assured that your purchase is guaranteed. Any problems please feel free to contact us first.
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