Unibit 5 Piece Hss Cobalt Multiple Hole 50 Sizes Step Drill Bit Set with Aluminum Case

Step drill bits set replaces 50 individual drill bits in 5 pieces step drill bits, which saves you a lot of trouble and space. Two-fluted design provides faster and 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. A well-organized box provides users with easy storage and transport, truly a must-have for DIY lovers and HVAC professionals.
Size:#1: 3/16″ to 1/2″ 6 Steps (3/16”, 1/4”, 5/16″, 3/8”, 7/16”, 1/2”)
#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”)
#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: 1/4″ 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: 3/16″ to 7/8″ 12 Steps (1/4”, 5/16″, 3/8″, 7/16″, 1/2″, 9/16″, 5/8″, 11/16″, 3/4″, 13/16″, 7/8″)”