Rank
#2
#2
Drill America GLBCOX629 #29 x 6" Cobalt Aircraft Extension Drill Bit, GLBCO Series
- 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
Rank
#3
#3
Drill America - D/ACO29P12 #29 Cobalt Heavy Duty Drill Bit (Pack of 12), D/ACO Series
- Cobalt steel tools are similar to high-speed steel, but with more cobalt for improved performance when cutting harder metals such as stainless steel or nickel alloys
- Gold oxide is a thinner oxide surface treatment than black oxide typically used to identify cobalt steel tools; performance is similar to uncoated tools
- 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
- Manufactured to National Aerospace standard 907
Rank
#4
#4
Drill America - DWDCO29P12 #29 Cobalt Drill Bit (Pack of 12), DWDCO Series
- Cobalt steel tools are similar to high-speed steel, but with more cobalt for improved performance when cutting harder metals such as stainless steel or nickel alloys
- Gold oxide is a thinner oxide surface treatment than black oxide typically used to identify cobalt steel tools; performance is similar to uncoated tools
- 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
- Ideal for drilling in tough, high tensile strength materials
Rank
#5
#5
Drill America - KFD29P12 #29 High Speed Steel Black & Gold KFD Split Point Drill Bit (Pack of 12), KFD Series
- High-speed steel tools are good for most general purpose applications, offering a combination of hardness and toughness for wear resistance
- For use in wood, metal, stainless and other hard metal drilling
- 135° split point tip prevents drill from "walking"
- Combination of hardness and toughness for wear resistance
- Black and gold drills are manufactured from premium grade high speed steel
Rank
#7
#7
12 PCS,1/4", HSS Black and Gold Coated Twist Drill Bits, Metal Drill, Ideal for Drilling on mild Steel, Copper, Aluminum, Zinc Alloy etc. Pack in Plastic Bag
- Bright finish: Classic M2 High Speed Steel construction with Bright Finish for proven capability and durability.
- Strength & Hardness: Made with HSS M2 steel, Rock wall Hardness Level HRC 62-63.
- Package & Size: 12 Pieces in a plastic bag, Diameter 5/16 inch, Total length 4 inch, Working length 2-3/4 inch.
- Professional & DIY Use: For use on metal, wood & plastics. Not For Use On Concrete / Masonry / Stainless Steel. Perfect match for workshop or service vehicles.
- 135 Tip & Twist Design: Increases cutting speed with self-centering and prevents walking, clears chips and particles faster.
Rank
#8
#8
BOSCH BDT832 8-32 Plug Tap and No. 29 Drill Bit Combo Set
- Tap and drill bit combo – provides a secure method of drilling the proper hole size before cutting right-hand internal threads
- Plug taps – engineered for cutting right-hand internal threads
- Included drill bit – is matched to tap for correct size, with a no-skate tip for accurate hole starts
- Heat-treated carbon steel tap – provides superior durability and speed
- Rolled tap threads – deliver more accuracy and are cleaner than machined threads
Rank
#9
#9
BeHappy Drill Bit Set 29 Pcs, 1/16"-1/2" Titanium Drill Bit Set, Drill Bits for Metal and Wood, High Speed Steel Drill Bit Set for Wood Plastic Aluminum Alloy Drilling
- 🔨【DRILL BILL SET】- Includes 1/16", 5/64", 3/32", 7/64", 1/8", 9/64", 5/32", 11/64", 3/16", 13/64", 7/32", 15/64", 1/4", 17/64", 9/32", 19/64", 5/16", 21/64", 11/32", 23/64", 3/8", 25/64", 13/32", 27/64", 7/16", 29/64", 15/32", 31/64", 1/2". Various sizes of drill bits make you fully qualified for various tasks
- 🔨【CLASSIC HSS CONSTRUCTION】 - With titanium coating for capability and durability, the cutting edge is hardened and honed for sharpness, chatter-free design with staggered cutting teeth ensure the precise countersinking and hole smooth clean
- 🔨【PRECISE 118° ANGLE POINT】 - Gold oxide finish and round straight shanks prevent walking, clear chips and particles faster, make drilling precise and faster. The storage case let you organize the bit set more properly
- 🔨【TITANIUM COATING】 - The drill bit set's titanium coated surface prevents rusting, which increases the hardness of the drill bit and reduces heat buildup, make the drill bit more wear-resisting. The storage case is convenient to organize drill bits
- 🔨【FULLY GROUND PROCES】 - Drill bits for metal use fully ground spiral design clears particles quickly, decreases friction and heat for a faster and cooler drilling performance. each drill bit is tested before packaging. These drill bits set are sturdy and durable, and can be cut quickly, allowing you to work efficiently
Rank
#10
#10
Neiko 10113A Left Hand Cobalt Drill Bit Set | 5 Piece | 5/64 19/64 in. | M35 Titanium Coated High Speed Steel | 135 Degree Self Centering Split Point | Fully Ground | Removing Broken Bolts
- [QUALITY]: This drill bit set is constructed of high speed steel with a titanium coating, which give it very high surface hardness to help penetrate tough materials.
- [DESIGN]: These drill bits come with a twist design to increase cutting speed with an angled tip that is a 135 degree split point for precise self-centering and designed to cut holes faster as it prevents walking, clears chips and particles faster.
- [LEFT-HAND BITS]: Special left hand design can also be used with reversible drills with screw extractors to remove broken fasteners and to remove screws, bolts, and studs for home repairs, at your automotive garage, and more.
- [CONVENIENCE]: Each bit has an assigned hole in a drill bit holder with size index markings for quick organization and easy storage for use for home improvement or on the go in a snap.
- [INCLUDES]: 5 Sizes - 5/64, 7/64, 5/32, 1/4 and 19/64 inch bits that come in a metal index case for easy storage.