[Heavy Duty+ for Stainless Steel] The M35 Cobalt Drill Bits is Industrial Grade and can drill 8X longer life and 3X faster. This Cobalt Drill bits can help you cut more holes, extra-heavy duty+ for Stainless Steel, Hard steel, Mild Metal, Galvanized Steel, Aluminum,Iron, Wood Plate,PVC and Copper. If you're expanding a lot of holes in metal sheet then please choose this step drill bit [M35 Cobalt Steel] This M35 Cobalt Drill bit can successfully drill more than 35 holes easily into 1/5" thick Stainless Steel plate like knife through butter! [12 Steps ︱2-Spiral-Flute] 12 Steps: from 3/16", 1/4", 5/16", 3/8", 7/16",1/2", 9/16", 5/8", 11/16", 3/4" 13/16" to 7/8". 2-Spiral-Flute:Clears Chips faster 【A Work Horse】This spiral shaped step bit is a work horse. Easily drilled through the steel platform of your zero-turn mower, cold rolled steel, lug bolt, old rack, iron rotors, tractor bucket, washer, heavy steel loader bucket was made for a tractor, hydroponics tubing,water pipe, cabinet [3/8" Tri-Flatted Shank] Fits into power tools chuck securely and eliminates slip Why Choose Oxmul Step Drill?
1, Cobalt M35 Drill Bits can cut 8X holes of other Titanium Step Drill Bits, Extra-heavy duty+ for Stainless Steel, very Hard Steel, Galvanized Steel, Iron, Copper, Mild Metal, AL, PVC and Wood Plate. Not for Plexiglass, Ceramic Tile.
2, If you will expand a lot of metal holes then please look for this step drill bit.
3, Drill Press Speed<200r/min, Hand impact drill Power>800W.
4, It is Industrial grade for Stainless Steel. Holes Test: 3mm thick 304 Stainless Steel square pipe, This Cobalt Step Drill bit successfully drilled 18X-1/2" holes before blunt. But other 4241 Step Drill only drilled 1 holes.

Specification:
Rank:Industrial grade
Duty:Extra-Heavy Duty+
Size: 3/16--7/8 inch, 12 Steps
Material Steel: M35 Cobalt HSS
Manufacturer No.:#35A2
Increments : 1/6 inches
Shank Diamter: 3/8" Tri-Flatted shank
Flute Style: 2-Spiral-Flute
Cooling: Cutting Oil (no water)
Maintain:Thin layer Anti-Rust oil or Volatile Anti-Rust oil
Apply to:Stainless Steel, very Hard Steel, Mild Metal, Galvanized Steel,Aluminum,Wood