Best Black Oxide Installer Drill Bits in 2026

Withstands high-temperature applications for extended periods of time (up to 1,100 degreeF)

Rigid, thick web design adds stability to bit in tough applications

Surface hardened to penetrate tough abrasive materials

Speed helix design for three times faster drilling than standard bits

Last 50 percent longer than high-speed steel

Easier drilling, reduced heat and extended drill bit life

Speed helix design for three times faster drilling than standard bits

Last 50 percent longer than high-speed steel

Easier drilling, reduced heat and extended drill bit life

Cobalt M42 drill bit – provides upgraded M42 Cobalt jobber-length bits designed for durability, high heat resistance and Hardened surface for stainless steel, cast iron, titanium, light-gauge metal and aluminum

Enhanced M42 alloy material – contains 8% Cobalt alloy that delivers 10x life vs. Standard bits

High-heat resistant bits – withstand high-temperature applications for extended periods of time

Speed helix design for three times faster drilling than standard bits

Last 50 percent longer than high-speed steel

Easier drilling, reduced heat and extended drill bit life

Extreme Durability: Cobalt high speed steel drill bits along with the titanium coating ensures extreme durability, will stay new and shiny for years to come.

Different Sizes of Holes Can Be Drilled: Different sized shanks ensure compatibility with 1/4, 3/8 and 1/2 in. chuck sizes. You are capable to drill holes in different sizes which can meet your normal needs.

Smooth Drilling: Non-walking drill tip provides fast and smooth drills on steel sheets, aluminum sheets, wood board, plastic board etc. (the board must be smaller in thickness than the height of step drill bits).

Withstands high-temperature applications for extended periods of time (up to 1,100 degreeF)

Rigid, thick web design adds stability to bit in tough applications

Surface hardened to penetrate tough abrasive materials, Cuts through light gauge metal, high carbon steel, aluminum and alloy steel, cast iron and stainless steel

Speed helix design for three times faster drilling than standard bits

Last 50 percent longer than high-speed steel

Easier drilling, reduced heat and extended drill bit life

Withstands high-temperature applications for extended periods of time (up to 1,100 degreeF)

Rigid, thick web design adds stability to bit in tough applications

Surface hardened to penetrate tough abrasive materials

Speed helix design for three times faster drilling than standard bits

Last 50 percent longer than high-speed steel

Easier drilling, reduced heat and extended drill bit life

Speed helix design for three times faster drilling than standard bits

Last 50 percent longer than high-speed steel

Easier drilling, reduced heat and extended drill bit life

Speed helix design for three times faster drilling than standard bits

Last 50 percent longer than high-speed steel

Easier drilling, reduced heat and extended drill bit life

Speed helix design for three times faster drilling than standard bits

Last 50 percent longer than high-speed steel

Easier drilling, reduced heat and extended drill bit life

Speed helix design for three times faster drilling than standard bits

Last 50 percent longer than high-speed steel

Easier drilling, reduced heat and extended drill bit life

Speed helix design for three times faster drilling than standard bits

Last 50 percent longer than high-speed steel

Easier drilling, reduced heat and extended drill bit life

EXTRA LONG LENGTH & 2 TYPE SHANK: Extra long 300mm body provides better stability and balance during quick operation to ensure position is intact. Flute length is 180mm with ROUND shank and REDUCED shank.

HIGH QUALITY MATERIAL: Classic Carbon Steel Material for fast cutting against tough wood material. High hardness, offer superior cutting power and durable.

FULL SET OF STANDARD SIZE: With the drill bits we offered, you can process 7 different diameter holes, ( Round shank| 1/8'', 3/16'', 1/4'', 5/16'', 3/8'' Reduced Shank| 7/16'', 1/2'' ), which meet your different needs perfectly.

Cobalt drill bits: Classic M2 High Speed Steel construction with Black and Gold finish for proven capability and durability.

Hardness: M2 Twist drill bits’ Rock wall Hardness Level HRC 62-63.

Package & Size: 12 Pieces drill bits in a plastic bag, Diameter 7/32 inch, Total length 3-3/4 inch, Working length 2-1/2 inch.

DURABLE QUALITY: Twist drill bits are made from high-speed steel for high hardness and durability

PROFESSIONAL DIY USE: Increases cutting speed with self-centering and prevents walking, clears chips and particles faster. They are great for most drilling jobs and materials such as aluminum, wood, plastics

DIFFERENT: Extra-long length drill bit reaches farther and drills deeper than a jobber or long length drill bit. Extra long cutting edge allows you using these bits to drill deep holes

【Twist Drill Bit Set】Come with 8 pieces drill bit in different sizes of the most popular drill bits, can meet your varied requirements! 8 sizes: 4, 4.2, 4.5, 5, 5.2, 6, 8, 10mm OD.

【HSS Twist Bits】Twist drill bits are made from High-speed Steel for high hardness and durability, not easy to bend. Sturdy and longer life!

【Extra Long Bit】Extra long cutting edge great for general purpose use on hand drills and allows you using these bits to drill deep holes. Length: 200mm (about 7.9'')

99pcs Drill Bits Include: 11pcs of each size( 1/16", 5/64", 3/32", 7/64", 1/8", 9/64", 5/35", 11/64", 3/16", 13/64", 7/32", 15/64", 1/4", 17/64", 9/32", 19/64", 5/16", 21/64", 11/32", 3/64", 3/8", 25/64", 13/32", 27/64", 19/32", 29/64", 15/64", 31/64", 1/2") drilling dia M35 straight round shank twist drills, can accommodate a wide range of drilling needs.

M35 Twist Drill Bit: Made from M35 cobalt material which has the characteristic of high hardness and durability. The cobalt material gives the bit superior wear resistance and overall toughness, making it great for long-term use in a variety of drilling applications.

Quick and Clean Drilling: The external point angle design of this cobalt twist drill bit allows for fast and efficient drilling, with effective chip removal to prevent clogging, perfect for a range of materials including metal, wood, and plastic.

13pcs Drill Bits Include: 1pcs of each size( 1/17", 7/89", 6/61", 11/93", 12/95", 4/29", 14/89", 14/79", 17/90", 13/66", 21/97", 17/72") drilling dia M35 straight hex shank twist drills, can accommodate a wide range of drilling needs.

M35 Twist Drill Bit: Made from M35 cobalt material which has the characteristic of high hardness and durability. The cobalt material gives the bit superior wear resistance and overall toughness, making it great for long-term use in a variety of drilling applications.

Quick and Clean Drilling: The external point angle design of this cobalt twist drill bit allows for fast and efficient drilling, with effective chip removal to prevent clogging, perfect for a range of materials including metal, wood, and plastic.