Best Cmt Long Length Drill Bits in 2026

Daisy
Last Updated: Jul 18, 2026

At a Glance: Our Top Picks for Cmt Long Length Drill Bits

Drill America GLBCOX65/32 5/32" x 6" Cobalt Aircraft Extension Drill Bit, GLBCO Series
#TOP1
Drill America Glbcox65/32 5/32" X 6" Cobalt Aircraft
9.8
PM SCORE
Drill America - GLBCOX121/4 1/4" x 12" Cobalt Aircraft Extension Drill Bit, GLBCO Series
#TOP2
Drill America - Glbcox121/4 1/4" X 12" Cobalt
9.8
PM SCORE
Drill America - DWDA/CX61/8 1/8" x 6" High Speed Steel Aircraft Extension Drill Bit, DWDA/C Series
#TOP3
Drill America - Dwda/Cx61/8 1/8" X 6" High
9.7
PM SCORE

* PickSmartly editors independently research, review, and endorse the top products through comprehensive data analysis. We may earn a commission for qualifying purchases made through our product links.

Summary of the Best Cmt Long Length Drill Bits of 2026

Drill America Glbcox65/32 5/32" X 6" Cobalt Aircraft Extension Drill Bit, Glbco Series

DRILL AMERICA
GLBCOX65/32
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

Effective in drilling tough, high tensile strength materials like stainless steel, inconel and titanium

135° split point tip prevents drill from walking

Round shanks allow use with a wide variety of tool holding systems

Gold oxide is a thinner oxide surface treatment than black oxide typically used to identify cobalt steel tools; performance is similar to uncoated tools

6" overall length for drilling where extra length for reach is required

Drill America - Glbcox121/4 1/4" X 12" Cobalt Aircraft Extension Drill Bit, Glbco Series

DRILL AMERICA
GLBCOX121/4
6.00 X 4.00 X 2.00 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

Effective in drilling tough, high tensile strength materials like stainless steel, inconel and titanium

135° split point tip prevents drill from walking

Round shanks allow use with a wide variety of tool holding systems

Gold oxide is a thinner oxide surface treatment than black oxide typically used to identify cobalt steel tools; performance is similar to uncoated tools

12" overall length for drilling where extra length for reach is required

Drill America - Dwda/Cx61/8 1/8" X 6" High Speed Steel Aircraft Extension Drill Bit, Dwda/C Series

DRILL AMERICA
DWDA/CX61/8
6.00 X 4.00 X 2.00 Inches
2.00 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance

Black oxide treatment adds lubricity and creates small pockets on the surface of the tool that act to hold coolant near the cutting edge

Round shanks allow use with a wide variety of tool holding systems

When run in a counterclockwise direction (right-hand cut) spiral fluted tools evacuate chips up and out of the cut to reduce clogging

Manufactured to national aerospace standard 907

Drill America - Dwddl8X1/4 1/4" X 8" High Speed Steel Extra Long Drill Bit, Dwddl Series

DRILL AMERICA
DWDDL8X1/4
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance

Black oxide treatment adds lubricity and creates small pockets on the surface of the tool that act to hold coolant near the cutting edge

Round shanks allow use with a wide variety of toolholding systems

When run in a counterclockwise direction (right-hand cut) spiral fluted tools evacuate chips up and out of the cut to reduce clogging

For general purpose drilling in applications where extra length for reach is required, designed to perform in a broad range of materials in the iron and steel families

Drill America - Dwddl12X3/4 3/4" X 12" High Speed Steel Extra Long Drill Bit, Dwddl Series

DRILL AMERICA
DWDDL12X3/4
1.00 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance

Black oxide treatment adds lubricity and creates small pockets on the surface of the tool that act to hold coolant near the cutting edge

Round shanks allow use with a wide variety of toolholding systems

When run in a counterclockwise direction (right-hand cut) spiral fluted tools evacuate chips up and out of the cut to reduce clogging

For general purpose drilling in applications where extra length for reach is required, designed to perform in a broad range of materials in the iron and steel families

Drill America 5 Piece High-Speed Steel Extra-Long Drill Bit Set (1/4 - 1/2" X 12" Long), Pou Series

DRILL AMERICA
POUDWDDL12
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

Sizes included are 1/4", 5/16", 3/8", 7/16" and 1/2" with overall length of 12"

High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance

For general purpose drilling in applications where extra length for reach is required, designed to perform in a broad range of materials in the iron and steel families

When run in a counterclockwise direction (right-hand cut) spiral fluted tools evacuate chips up and out of the cut to reduce clogging

Round shanks allow use with a wide variety of tool holding systems

#TOP7

Drill America #15 X 12" High Speed Steel Aircraft Extension Drill Bit, Dwda/C Series

DRILL AMERICA
DWDA/CX1215
6.00 X 4.00 X 2.00 Inches
1.00 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance

Black oxide treatment adds lubricity and creates small pockets on the surface of the tool that act to hold coolant near the cutting edge

Round shanks allow use with a wide variety of tool holding systems

When run in a counterclockwise direction (right-hand cut) spiral fluted tools evacuate chips up and out of the cut to reduce clogging

Manufactured to national aerospace standard 907

Top 10 long length drill bits Brands on Amazon

Here is the list of top-rated brands that were evaluated by PM.

Brand Count
Drill America 7

Top 10 long length drill bits Brands Pie Chart


We've carried out a comprehensive analysis of 4,246 reviews on long length drill bits, using our selection criteria to identify the best options in the home improvement. Our findings reveal that most customers typically select long length drill bits priced around $20.76, with top brands including somada, neiko, bosch, drill america, fulton, dewalt, baker and bolt, dudua and comoware and drill hulk

Our team of expert editors reviewed these high-quality items and handpicked the top 7 long length drill bits for your consideration. We've also done extensive research on numerous sellers, identifying the best ones in the home improvement category. These include carolina tools, amazon.com, peachtree woodworking supply inc, awadeals, xintang shengrui trading company, tianhe district, tg tools, drillhulk, muxizac-us and lldsimex and chiciris .

We are dedicated to assisting our users in finding the right bits Products based on their needs, saving them considerable time when choosing which long length drill bits to buy. We take pride in the number of satisfied users we've helped through our thorough and insightful reviews.