HQMaster Titanium Step Drill Bit Tool Set High Speed Steel HSS Quick Change Two-fluted Design with Aluminum Case, 5-Piece Set Total 50 Sizes

Features:
HQMaster step drill bits set replaces 50 individual drill bits in 5 pieces step drill bits, which saves you a lot of trouble and space.
Automatically deburr holes, two-flute design gives you faster, smoother cutting.
Cobalt steel along with titanium coating ensures this set with outstanding durability and will stay sharp for years to come,
perfect to cut holes on steel, aluminum sheets etc. It is truly a must-have for DIY lovers and HVAC professionals.

Size specifications:
#1: Total Length: 60mm；Edge Dia.: 12mm；Edge Length: 35mm；Shank Dia.: 6mm
3/16" to 1/2" 6 Steps (3/16'', 1/4'', 5/16", 3/8'', 7/16'', 1/2'')

#2: Total Length: 76mm；Edge Dia.: 12mm；Edge Length: 52mm；Shank Dia.: 6mm
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'')

#3: Total Length: 73mm；Edge Dia.: 19mm；Edge Length: 41mm；Shank Dia.: 9mm
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: Total Length: 80mm, Edge Dia.: 35mm, Edge Length: 47mm, Shank Dia.: 9mm
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")

#5: Total Length: 80mm, Edge Dia.: 22mm, Edge Length: 47mm, Shank Dia.: 9mm
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")

Package included:
5x step drill bit