5pcs HSS Cobalt Titanium Step Drill Bits, Multiple Hole 50 Sizes

Note:

Cant be used for stainless steel and the steel thickness is less than 3mm

Due to the light and screen setting difference, the item's color may be slightly different from the pictures.

Please allow slight dimension difference due to different manual measurement.

Features:

100% brand new and high quality.
5pcs Hss Cobalt Multiple Hole 50 Sizes Step Drill Bit Set W/ Aluminum Case.
Hss Cobalt Multiple Hole 50 Sizes Step Drill Bit Set.
HSS Cobalt Drill Bit Set 50 Sizes Step Tools Multiple Hole.
This set replaces 50 individual drill bits.
3-sided (TRI-FLAT) shank will not slip in your drill's chuck.
Cobalt coated for smoother cooler cutting.
SELF STARTING - No need for a pilot hole.
Cobalt coated to reduce friction and run cooler.
Large bit has 3-sided shank and small bits have hex shank to prevent slip in drill chuck.
Automatically deburrs holes as you drill.
Long Life True M2 high speed steel.
Includes protective padded aluminum case.
Specifications:
Two flutes, automatically deburrs as you drill.
Tri-flat shank for sure grip.
Material:HSS
Shank: Triangle shank
Quantity: 5PCS
Sizes:
#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")

Drill size        Shank Diameter
1/4-1-3/8              9mm
3/16-7/8               9mm
1/4-3/4                 9mm
1/8-1/2                 6mm
3/16-1/2               6mm
Package included
1pc 1/4-1-3/8 Hss Cobalt Multiple Hole 50 Sizes Step Drill Bit Set