Best 3 8 inches industrial drill bits review 2021 – Top Pick

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Best 3 8 inches industrial drill bits list 2021. Detail review below the list:

Last updated on December 22, 2020 12:40 am

Detail review:

DEWALT Step Drill Bit, Impact Ready, 3/16-Inch-7/8-Inch (DWA1786IR)

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as of December 22, 2020 12:40 am


  • Titanium two flute spiral design provides longer life and better chip removal
  • Split point tip increases speed
  • Laser engraved numbers increases step visibility
  • Optimized for impact driver usage

(21Pcs Set+3 Pcs Free) 1/16"-3/8" cobalt drill bit set, containing 5% cobalt,quenched and finely polished, suitable for hard metals, stainless steel, cast iron and other hard materials
as of December 22, 2020 12:40 am


  • ★[AIGLEROUGE Founded in California in 2011] It is one of the earliest drill design and development teams. In 2013, the company adopted high wear resistance, super-hard cobalt-containing high-speed steel, and used new technology to launch this cobalt-containing drill with fast drilling and long life. The technology is superior to ordinary drills on the market, and the performance is twice that of ordinary drills.
  • ★【Products in the box: 21 pieces + 3 pieces】: 21 pieces: 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". Free 3 pieces: 1/16", 5/64", 7/64".
  • ★【 Tougher materials, more conducive to chip removal】: HSS with 5% cobalt: durable, higher heat resistance and wear resistance. The hardness is higher than the 4241 HSS used in other similar drill sets. These drill bits also contain 5% cobalt, which improves wear resistance and durability. The 135° bifurcated drill bit can be used when contacting and the parabolic trough design can improve chip removal in metal and wood drilling applications.
  • ★【 Professional and widely used 】: M35 Cobalt HSS is more suitable for hardening materials. It is especially suitable for cutting hard metals, such as stainless steel, cast iron, high-temperature alloys, titanium alloys, hard plastics and wood. It can also be used for softer materials. Pay attention to the speed, pressure and heat control when drilling.
  • ★【 Easy to use next time, and very sturdy 】: The kit includes a drill holder with a size index for easy storage and organization.

THINKWORK Step Drill Bit, M35 Cobalt Spiral Groove & HSS Titanium Coated Straight Groove Step Drill Bit Set, Double-edged Blade, Used for Drilling Plate Aluminum Metal Wood Hole, Large Hole Drill Suitable for DIY Lovers, 1/4 to 1-3 / 8-Inch Drill Bit
as of December 22, 2020 12:40 am


  • 【M35 Cobalt High Speed ​​Steel】The durable step drill is made of HSS M35 cobalt, and the surface is plated with cobalt. The red hardness, wear resistance and toughness is stronger, not easy to become dull or broken.It is an ideal choice for cutting carbon steel and stainless steel. When you need to expand the hole in the stainless steel plate, such as expanding the kitchen sink hole, please use it. The addition of cobalt increases heat resistance and is widely used in metal manufacturing.
  • 【HSS titanium coating】Another step reaming drill is made of high-speed steel, which can ensure sharp, fast execution and maintain strength and efficiency. The surface is treated with a titanium alloy, which greatly improves the cutting performance of the drill bit, is more wear-resistant, and extends the service life. It is an ideal choice for materials ranging from iron, aluminum, plastic, fiberglass to wood.
  • 【Efficient Design】The 135°X split point can be automatically centered to increase the cutting speed and prevent walking. The double spiral groove & double straight groove design can reduce cutting resistance, make cutting smoother, remove chips faster, and make particles easier to escape, thereby achieving cleaner drilling operations. The convenient 3/8” (9.5mm) triangular shank prevents the drill chuck from slipping and can be suitable for most brands on the current market.
  • 【Total 20 Step Sizes】1/4", 3/8", 1/2", 5/8", 3/4", 7/8", 1", 1-1/8", 1- 1/4", 1-3/8", there is a size mark on the side of each step, which is convenient for you to use. It can replace 10 separate drill bits, saving the time and cost of replacement, and can automatically deburr during the drilling process. Keep the drill bit clean. It is an essential item for handymen or professionals, very suitable for home maintenance and light work.
  • 【After-Sales Service】If you encounter any problems when using our products or are not satisfied with the products, please feel free to contact us. The THINKWORK after-sales service team will contact you in time to solve your problem.

Anbull 3pcs 31.5’’(H) × 4"/ 6"/ 8"(W) Earth Auger Spiral Drill Bit, Post Hole Digger Replacement Auger Bits for 3/4" Shaft Extension Bar and Auger Powerhead
as of December 22, 2020 12:40 am


  • Made from High manganese steel & Iron for maximum digging performance. Digs holes up to 31.5" deep and 4"/ 6"/ 8" wide in all soil types.
  • Leaves dirt around the edge of dug hole for easy packing. Durable cast steel pilot bit ensures a long service life.
  • 100% Brand new and high quality! It is sutiable for drilling holes into the ground to plant trees.
  • It is easy to use and to install and durable and long using time. Three sizes of auger for you to choose.
  • Professional agricultural tool or other outdoor projects. Shank diameter: fits most hand-held post-hole diggers with 3/4" shaft.

Yangoutool Titanium Step Drill Bit,High Speed Steel 10 Steps from 1/4"-1-3/8" Inches with Safe Plastic Case

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as of December 22, 2020 12:40 am


  • 【TWO-FLUTE DESIGN: 】Clears chips faster and allows particles to escape easily.
  • 【HSS TITANIUM COATING: 】Made of high speed steel and titanium coated for added durability and bit life.
  • 【WIDE APPLICATION:】Works on plastic,wood and most metals,including steel,brass,aluminum and copper.
  • 【INCLUDES 10 STEP SIZES:】1/4",3/8",1/2",5/8",3/4",7/8",1",1-1/8",1-1/4",1-3/8".
  • 【SAFETY AND STABILITY:】 The 3 flat shank is better clamped on the pistol drill to prevent slippage and shedding during the rotation.

MAX-CRAFT 3/16" x 8" - 12Pcs SDS-Plus Drill Bit Set,Carbide Tip, SDS+Rotary Hammer Drill Bit Masonry Drill for Stone, Bricks, Cement,Concrete in Construction Building Works
as of December 22, 2020 12:40 am


  • ▲ITEM DESCRIPTIONS: SDS-Plus Rotary Hammer Drill Bits Chucking in Cordless Drill or Electric Hammer Drill
  • ▲CUTTING POINT: YG8C Carbide Tipped for Cutting/Drilling Point for Best and Durable Cutitng Performance with Extra Long Tool Life.
  • ▲SHANK BODAY MATERIAL: 40CR Alloy Steel for Shank Production to Guarantee higher hardness and wear-resistance for long working life
  • ▲FLUTE DESIGN:The shank has two types of grooves (TOTAL OF FOUR). The smaller grooves fix bit in the chuck. The larger grooves allow bits slipping in the chuck when working, enhancing the drilling torque and hammering energy.
  • ▲MULTIPLE APPLICATION:Concrete drill bits set is fully compatible with All SDS-Plus Rotary Hammer Drill, like BOSCH, Dewalt, MAKITA, Milwaukee, etc. Ideal for drilling holes in concrete, brick, stone and masonry.

INTOO Mini Drill Bit Set 60 Pcs+12 Pcs Free High Speed Steel HSS Titanium Micro Drill Bits 3/64"-1/8" Metal,Plastic,Wood Drill Bit Sets Small Drill Bit
as of December 22, 2020 12:40 am


  • SPECIFICATIONS: 60pcs+12pcs FREE HSS titanium drill set, inch size 3/64",1/16", 5/64", 3/32", 7/64", 1/8", 12 pcs/size
  • HSS MATERIAL: Industry grade high speed steel with high hardness, good wear resistance and durability.
  • CHARACTERISTICS: 118° precise point with sharpened edge promises cutting speed ; titanium coating increases the ware-resistance and durability of the drill bit, effect long life drilling.
  • PROFESSIONAL & DIY USE: widely used in Steel, Wood, Plastic, etc. Ideal for DIY, home and general building/engineering using. Not for masonry and concrete drilling.
  • STORAGE PACKING: each size 12pcs packed into a single transparent plastic box for non-disposable use,moreover, maximize rust protection. 6-size boxes together into a plastic sleeve,easy to collect.

2Pcs/Lot Core Drill Bit Adapter for Threaded Diamond Core Drill -3/8" Triangle to 5/8"-11 Male (3/8”)
as of December 22, 2020 12:40 am


  • Diamond core drill bit adapter for threaded core drill bits hole saw, 3/8" triangular shank to 5/8" 11 threaded male.
  • Connects to core bits with 5/8" 11 threaded female arbor, and changes to connector to 3/8" threaded .
  • Adapter for Drilling and Grinding Concrete, Glass, Granite, Stones.
  • Triangle Shank can be use to Connect to Compatible Power Tools and Hand Tools.
  • Overall length: 2 1/2", Shank length: 1 1/2".

SPKLINE 10 Pcs High Speed Steel Cobalt Drill Bit Set 2 Pcs of Each 1mm(3/64"), 1.5mm(1/16") 2mm(5/64") 2.5mm(3/32") 3mm(1/8") Jobber Length Twist M35 Metal Drill Bit For Stainless Steel And Hard Metal
as of December 22, 2020 12:40 am


  • 10 pcs mini size cobalt drill bit set for micro hole drilling into various material, it contains 2 pcs of each 1mm(3/64"), 1.5mm(1/16"), 2mm(5/64"), 2.5mm(3/32"), 3mm(1/8") diameter drill bit
  • Very tough drill bit for heavy duty work drilling into stainless steel, light-gauge metal, high-carbon steel, aluminum and ally steel, cast iron, abrasive alloy metal, other hard metal and hardened steel. 4 times life time than normal metal drill bit when drilling into PCB board, plastic, wood, jewelry, sheet metal and normal steel
  • M35 Cobalt drill bits are made from industrial grade High Speed Steel with 5% cobalt alloy that is heat and abrasion-resistant
  • 135-degree split-point tip starts drilling immediately with less force and eliminates walking or skating across the work surface
  • Straight shank fits with electric and cordless power drill and rotary drill. Drill bits are packed in a Plastic Bag

Concord Blades CBD03500HP 3-1/2 Inch Laser Welded Dry/Wet Diamond Core Drill Bit
as of December 22, 2020 12:40 am


  • 10 mm segment height, 4.0mm Segment Width, 5/8"-11mm Arbor
  • Use Dry/Wet
  • This core bit is used for general purpose dry drilling on a variety of soft brick and concrete block using either a Handheld Core Drill or a Core Drill Rig
  • Does not come with a pilot bit
  • Item is a pearlescent color. It changes between white and silver depending on the lighting

Best 3 8 inches industrial drill bits Buying Guide

Before you buy a 3 8 inches industrial drill bits , you should clarify your doubts in advance. Get help from other users’ opinions. Are there other things to consider besides the details described? Is the color correct, as you saw in the picture of the online shop? What is the actual content? Does the product still work after being exposed to water?

These are all questions that you as a consumer will surely ask. The manufacturers certainly want to achieve high sales with their products. The better known the brand is, the better the products are. Of course, there are also small and unknown brands that offer high quality products.

Therefore, pay attention to additional purchasing criteria. After all, it’s obvious that price is a deciding factor. If the price is not proportional to the quality, I recommend that you buy another product.


Just consider my rankings for best 3 8 inches industrial drill bits above as a suggestion. The final choice is yours. Hope you can choose the best for you. Thanks for your reading. Have a nice day !