Top 10 Best Drill Bit For Hardened Steel Bolt 2023- The Honest Review

Features :

• REPLACES 28 DRILL BITS: This set includes three standard SAE step drill bits that replace 28 individual drill bits allowing for you to spend more time working, than swapping out drill bits.
• TITANIUM COATED HSS UNIBIT: Made of high-speed steel with titanium coating for added durability and bit life. Suitable to drill though plastic, aluminum, copper, stainless steel, and many other types of sheet metal.
• SMOOTH DRILLING ACTION: Two-flute spiral design provides faster, smoother cutting without walking and a tri-flat shank to ensure a firm grip. Our titanium 2 step bits for metal are perfect for all your DIY, general building, and engineering tasks.
• COMPLETE STEP DRILL BIT SET: Comes with one 3/16-inch to 1/2-inch six-step bit, 1/4-inch to 3/4-inch nine-step bit, and 1/8-inch to 1/2-inch 13-step bit
• STEP BIT SET CUTS AND DEBURRS: Cuts through steel, sheet metal and other surfaces with only a small amount of pressure and deburrs as you drill. Our unibit step drill bit is compatible with most drills on the market.

Features :

• 29 PIECES INCLUDED: 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″.
• HSS WITH 5% COBALT: Durable, Higher Heat & Abrasion Resistance.
• PRECISE 135°SPLIT POINT & TWIST DESIGN: Prevent walking, clear chips and particles faster.
• PROFESSIONAL & WIDELY USE: M35 Cobalt HSS is more suitable for hardened material. Particularly successful in cutting through hard metals such as stainless steel, cast iron, high temperature alloy, titanium alloy, hard plastics and woods, and also can be used for softer materials.
• ORGANIZED HOLDER: Set includes the drill bit holder with size index for easy storage and organizing.

Features :

• 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
• Thick web-helix design – provides additional stability in tough applications
• Surface-hardened tip – penetrates tough abrasive materials
• Includes – 1/16″, 5/64″, 3/32″, 7/64″, 1/8″, 9/64″, 5/32″, 3/16″, 7/32″, 1/4″, 5/16″, 3/8″, 1/2″

Features :

• Super Premium Solid Cobalt M42+ Steel
• 1/16″ to 1/2″ by 1/64th Increments (Does Not Skip any Sizes)
• 135 Degree Split Point Prevents “Walking”
• Tri-Flat Shank Prevents “Spinning” in the Drill Chuck
• Lifetime Warranty

Features :

• UNIQUE 3X FLUTE DESIGN – Lichamp three flute patent design drill bit clears chips and particles faster, provide you with more efficient drilling experience.
• 4X LIFESPAN MATERIAL – Made from industrial grade M35 high-speed steel with 5% cobalt provides hardness for wear resistance, withstands max 1100 degreeF.
• MULTIPLE APPLICATION – Ideal for drilling in heavy-duty tough metal, including hard abrasive alloy metal, hardened stainless steel or cast iron.
• SMOOTHLY DRILLING – 135-degree split point tip & twist design increases cutting speed with self-centering and prevents skating starts or walking.
• 1/2″ COBALT DRILL BIT – Round straight shanks, include 5 pack 1/2-inch diameter hss drill bit with well organized clear ps case.

Features :

• HSS Titanium Coating – High speed steel along with titanium coating ensures outstanding durability and sharpness, can reduces the friction, runs cooler.
• Meet Your Demands – With the step drill bits we offered, you can process different kinds of diameter holes, which greatly saves you a lot of trouble.Great for metal/wood/plastic countersunk. Suitable for Home DIY, and General Building/Engineering Use.
• Design – The split point tip is at 118 degrees to increase the wear resistance. The two flute design provides a smoother cutting, allows the material particles escape easily for a much more clean drilling operation.
• Easy Organizing – A drill bits holder with size index is included in the metal kit for easy storage and organizing without fear of it falling out.
• Set Includes – The drill bits set includes five common sizes for versatility, can fit the majority of brands currently on the market.

Features :

• UNIQUE 3X FLUTE DESIGN – Lichamp three flute patent design drill bit clears chips and particles faster, provide you with more efficient drilling experience.
• 4X LIFESPAN MATERIAL – Made from industrial grade M35 high-speed steel with 5% cobalt provides hardness for wear resistance, withstands max 1100 degreeF.
• MULTIPLE APPLICATION – Ideal for drilling in heavy-duty tough metal, including hard abrasive alloy metal, hardened stainless steel or cast iron.
• SMOOTHLY DRILLING – 135-degree split point tip & twist design increases cutting speed with self-centering and prevents skating starts or walking.
• 1/8″ COBALT DRILL BIT – Round straight shanks, include 10 pack 1/8-inch diameter hss drill bit with well organized clear ps case.

Features :

• High Quality Material – High Speed Steel M35 (Cobalt 5%) provide extended tool life compared to ordinary drill bits when drilling hard materials.
• Characteristics – 135° split point with round straight shank, self-centering prevent walking, make drilling precise and faster. Fully Ground twist design helps clear particles faster, decreases friction and heat for a cooler drilling performance.
• Widely Used – M35 Cobalt High Speed Steel is more suitable for tough, high tensile strength material. Particularly successful in cutting harden metals such as stainless steel, cast iron, high temperature alloy, titanium alloy, hard plastics and woods, and it also can be used for softer materials.
• Specifications – Set of 29pcs jobber length drill bits 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″, by 1/64″ Increments.
• 100% Satisfaction Guarantee – If you are not fully satisfied with our product for any reason, please feel free to contact us, we will try our best to serve you.

Features :

• DEWALT drill bit set has connectable accessory storage system to optimize storage space
• Patented bit-bar design of the drill bits set allows easy removal of bits and customizable placement
• Clear lid of the Titanium Nitride Coated drill bit set allows you to easily see contents at glance
• Clip latch for secure closing
• Small Bulk Storage size fits inside the Small and Medium ToughCase plus (sold separately) – Ideal for organizing loose bits
• Includes: 1/16″ x 2, 5/64″ x 2, 3/32″ x 2, 7/64″ x 2, 1/8″ x 2, 9/64″ x 1, 5/32″ x 1, 11/64″ x 1, 3/16″ x 1, 13/64″ x 1, 7/32″ x 1, 15/64″ x 1, 1/4 x 1, 5/16″ x 1, 3/8″ x 1, 1/2″ x 1
• Tapered web provides greater durability to reduce breaking.
• Drill Bit Set includes sizes from 1/16-inch to 1/2-inch in a plastic tough case.

Features :

• SET OF 13 COBALT DRILL BITS – In the following imperial sizes 1/4″, 15/64″, 7/32″, 13/64″, 3/16″, 11/64″, 5/32″, 9/64″, 1/8″, 7/64″, 3/32″, 5/64″, 1/16″
• M35, Fully Ground, 135° Split Point – Our Drill Bits Contain 5% Cobalt, Are Fully Grounded for a Precision Drilling Diameter. 135° Split Point Design Makes it Easier to Drill Repeated Holes in Harder Materials.
• PLASTIC STORAGE CASE INCLUDED – Incredibly Tough and Durable Plastic Case. Perfect for Keeping Your Cobalt Drill Bits Neatly Organized and Safe.
• COBALT DRILL BITS ARE THE PERFECT DRILL BITS FOR METAL – As well as other hard materials such as Stainless Steel, Hardened Steel, Cast Iron, Bronze, Titanium, and More!
• LIFETIME GUARANTEE – Here at Owl Tools (USA Based Company) we only care about your satisfaction. We try our best to ensure each product is in perfect condition before you get it, but if something is not up to your satisfaction, please contact us for a full refund or replacement.