Dewalt DCD991 vs. DCD791 Review

Dewalt has long established a reputable name in the power tool world by bringing out some of the best in the industry. Professional builders and hobbyists alike who require the finest cordless drills available are not disappointed with this brand.

Once you are entangled in one manufacturer’s network of tools, it would be more beneficial and cost-effective if you stick with them rather than having multiple products by different makers.

Today, we will review two of Dewalt’s drill driver kits to give you in-depth information on which of these powerhouse tools you should add to your collection.

DEWALT DCD991B Bare Tool 20V MAX XR Brushless Drill Driver

DEWALT 20V MAX XR Brushless Drill/Driver with 3 Speeds - Bare Tool (DCD991B)The DCD991B has a hammer drill feature that lets you work with concrete or even rock because of its 820 unit watts out of power (UWO) or 885 in. lbs. of maximum torque and the brushless motor it uses. 

All of us working with power tools are quite familiar with brushless motors by now since this technology has been used since the 60s. We all know that brushless means smarter tools, and by this, I mean added performance and durability.

This drill driver has a three-speed all-metal transmission that gives you speed ranges from 450 to 2,000 RPM, more than enough to do heavy-duty jobs.

You can turn off the hammer drill function and use it for driving and drilling in softwoods, thin metals, and plastics. The removable side handle rotates 360 degrees, letting you get the right grip on the tool all the time.

It is well built with its nitro-carbonized, heavy-duty, ½-inch metal ratcheting chuck that is so good at gripping bits when the drill uses high power.

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It is ergonomically designed to be lightweight and easy to handle, weighing just 4.6 pounds and giving it a nicely balanced and comfortable grip.

This drill driver is equipped with a 60-lumen LED light that is strategically located at the base of the unit.

It has three settings which include a spotlight mode with an option to delay for up to 20 minutes after the trigger is released. This feature makes this perfect for working in dim places and tight spaces.

Pros: This model is ideal for masonry work such as driving anchors in concrete and is so versatile that you can use it for working on softer materials as well.

The side handle comes in handy when your work needs precision and control while using the drill at high speeds.

  • Variable speed design for increased performance
  • Comes with a 360-degree angled handle
  • Chuck is tight and doesn’t get loose easily
  • Equipped with a side handle for precision and control
  • Uses brushless motor technology

Cons: Some users complain of loose-fitting battery packs, but that is a case-to-case basis. In order to avoid this, it is highly recommended to order from reputable sellers only.

  • No integrated bit holders
  • The battery packs can get loose

DEWALT DCD791D2 20V MAX XR Brushless Compact Drill Driver Kit

DEWALT DCD791D2 20V MAX XR Li-Ion 0.5" 2.0Ah Brushless Compact Drill/Driver KitThe very first thing I noticed about the DCD791D2 is its light weight. Weighing just 3.4 pounds and measuring 6.9 inches from front to back, this is a very handy and small drill that fits comfortably in your hand.

Furthermore, it is well-balanced that the center of gravity is right above its grip, so it stays balanced while you are working.

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It also uses a brushless motor making it more power efficient and works twice the amount of time on a single charge.

It runs cooler and smoother as compared to an ordinary brushed motor. It has two-speed transmission settings that give you a low speed of up to 550 RPM and a high speed of up to 2,000 RPM.

The DCD791D2 comes with a three-mode built-in LED light with a spotlight mode which lets you work at night as it provides the illumination you need.

It is also suitable for working in cramped areas that are dimly lit and hard to reach. It uses 2.0 Ah 20V XR lithium-ion batteries that deliver long life and have more capacity over other battery packs such as NiCad batteries.

It has a battery fuel indicator that lets you know how much juice is left before you need to recharge. The kit comes with two batteries so you will not run out of power. You can charge one while using another.

Pros: This drill driver has a compact and lightweight design that is perfect for working long hours in confined spaces. It is well suited for masonry work and drilling through concrete and tough materials as well as plastics and wood.

  • 460 UWO or approximately 600 in. lbs. of maximum torque
  • Has three built-in LED lights
  • Comes with an all-metal and very well-made ratcheting chuck
  • Has two-speed settings
  • Has a long battery life

Cons: The drill bits sometimes fall off, so it is a good idea to tighten them before starting any project. Also, the LED lights are placed at an inconvenient location which results in shadowing.

  • LED lights cast shadows
  • Drill bits tend to fall off
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Dewalt DCD991 vs. DCD791 Product Comparison

The DCD991B and the DCD791D2 both run on brushless motor technology that makes them suited for professional use. Both have enough speed and power to go through one of the toughest jobs around which is masonry. But there is a big difference when it comes to the price.

The DCD991B comes with two batteries, a charger, a belt hook, a 360-degree side handle, and a toolbox. The DCD791D2 has two battery packs, one charger, a belt hook, and a toolbox as well.


Both of these kits are pro tools and can do the toughest jobs at home or the worksite. But looking at these specs, you can see that the DCD991B outperforms the DCD791D2.

With more speed, power, and features, you can do more with the former, but bigger sometimes does not always mean better. The lighter weight of the latter can let you work longer hours with fewer episodes of operator fatigue.

Also, I love the side handle that comes with the DCD991B. This is a very useful feature, but if you are on a limited budget, the DCD791D2 will do the job just as well.