Powerful Cordless Hammer Drill DEWALT FLEXVOLT Advantage 20V Review and Insights

  • Up to 42% more power achievable when used with FLEXVOLT batteries, making tough jobs easier.
  • The heavy-duty 1/2-inch ratcheting metal chuck with carbide inserts delivers exceptional bit grip and durability.
  • Features a 20x brighter LED light with a 3-mode setting, perfect for illuminating dark or tight work areas.
  • Compatibility with all DEWALT 20V MAX* and FLEXVOLT batteries adds great versatility and convenience.
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Description

Highlights of the DEWALT FLEXVOLT ADVANTAGE 20V MAX Hammer Drill

Testing the DEWALT FLEXVOLT ADVANTAGE 20V MAX Hammer Drill, Cordless, 1/2-Inch, Tool Only (DCD999B) has been a revealing experience. The promise of up to 42% more power when paired with the FLEXVOLT battery intrigued me, and I put it through some serious use. The heavy-duty 1/2-inch ratcheting nitro-carburized metal chuck with carbide inserts really stands out for grip strength, which means bits rarely slip—even under tough conditions. The 3-speed transmission allows me to optimize the drill’s speed depending on the task, whether it’s delicate woodwork or heavy masonry.

What caught my attention immediately was the 20X brighter LED light, which illuminates dark and confined spaces far better than any other cordless drill I’ve used. The spotlight mode with a 20-minute shutoff feature lets me work longer without worrying about battery drain from the light. This cordless hammer drill balances raw power and usability in a way that feels solid, but there are nuances to consider.

Positive Features That Make a Difference

Several aspects of this hammer drill have impressed me:

  • Power delivery is noticeably superior when using the FLEXVOLT battery, making it easier to handle tougher materials.
  • Compatibility with all DEWALT 20V MAX and FLEXVOLT batteries means I can swap batteries across other tools without hassle.
  • The tool connectivity with the Tool Connect Chip (sold separately) is a neat feature for managing tools on a jobsite, though I didn’t test this extensively.
  • The 360° side handle and belt hook add to comfort and convenience, especially for extended use.
  • Lightweight design at 3.5 pounds makes it manageable without sacrificing durability.

This drill feels like it belongs in the hands of both DIY enthusiasts and professionals. The brushless motor adds to the efficiency and longevity, which I appreciate since power tools tend to take a beating on my projects.

Drawbacks That Might Give You Pause

Despite the many perks, a few issues popped up during my testing:

  • The battery and charger are sold separately, which can catch newcomers off guard.
  • While the drill is cordless and powerful, the power boost really hinges on using the FLEXVOLT battery, which might mean extra investment.
  • The maximum chuck size of 1/2 inch is standard, but some heavy-duty tasks might require even larger capacities.
  • I noticed the drill can get a bit warm after prolonged hammer drilling, although it never overheated enough to shut down.
  • The price point is on the higher side, especially if you factor in the cost of batteries and charger.

For casual users or those on a strict budget, these limitations could be dealbreakers.

Versatility and Performance in Real Tasks

Trying the hammer drill on wood, metal, and masonry gave me a full picture of its capabilities. The maximum drilling capacity of 1/2 inch for both wood and metal is solid for most home improvement and construction jobs. The three-speed gearbox lets me dial in the perfect speed—lower for precision, higher for speedier drilling. The hammer function delivers a satisfying punch, breaking through concrete and brick with fewer passes than older drills I’ve used.

My nephew helped me test the drill on some DIY projects, and even he remarked on how easy it was to handle despite its power. The brushless motor not only improves battery life but also reduces maintenance, which adds to the tool’s appeal for long-term use. The LED lights helped us work in a dim basement, which is a big plus for indoor projects.

Quality for Price: Is It Worth It?

The DEWALT FLEXVOLT ADVANTAGE hammer drill sits at a premium price bracket compared to other cordless drills, but the features justify the cost for serious users. The ability to use it with both 20V MAX and FLEXVOLT batteries increases its flexibility and value across a tool collection. The power boost from FLEXVOLT batteries alone makes it a worthwhile upgrade for those already invested in DEWALT’s ecosystem.

If you’re after heavy-duty performance combined with portability, this drill delivers. However, buyers should be prepared for the extra expense of batteries and chargers, which are not included. For hobbyists who drill occasionally, this might be more drill than necessary, but professionals will appreciate the durability and adaptability.

Alternative Offerings in the Hammer Drill Market

Comparing this hammer drill to competitors like the Milwaukee M18 Fuel or Makita XPH12Z highlights some clear distinctions. While the Milwaukee M18 Fuel offers excellent power and battery life, it lacks the same brightness in LED lighting and the FLEXVOLT battery compatibility. Makita drills, on the other hand, often boast lighter builds but sometimes compromise on torque and chuck strength compared to this DEWALT model.

The DEWALT model excels in bit grip strength and power output, especially when paired with the FLEXVOLT battery, making it a better candidate for tougher jobs. However, competitors might offer better value if you don’t require the same level of power or don’t already own a DEWALT battery system. The Tool Connect compatibility is a unique edge for those managing multiple tools on job sites, which some rivals do not offer.

Ergonomics and Handling

Handling the drill feels balanced, thanks partly to the 360° side handle, which I found essential for controlling torque during hammer drilling. The weight distribution is smartly designed, so even during extended use, hand fatigue was less than expected. The belt hook is a small but thoughtful addition, letting me keep the tool handy without needing a bulky case.

The controls are intuitive. Switching between hammer, drill, and drive modes is straightforward, and the three-speed transmission adjusts smoothly without any noticeable lag or gear grinding. The trigger response is crisp, giving good control over speed, which is crucial for precision tasks.

Maintenance and Durability Impressions

The brushless motor means less wear and tear, which I appreciated immediately. There’s no need for frequent brush replacements—a common headache with older tools. The metal chuck with carbide inserts also shows no signs of wear despite heavy use, maintaining a tight grip on bits.

Dust accumulation can be an issue in hammer drills, but this one seems well-sealed enough to resist excessive dirt ingress, which should extend its lifespan. The casing feels tough and holds up well against drops and bumps. Given how I tend to treat my tools roughly, that durability gave me confidence in its build quality.

Pros:

  • Powerful performance with FLEXVOLT battery compatibility
  • Brightest LED lighting in its class for dark workspaces
  • Versatile 3-speed transmission for various materials
  • Durable metal chuck with strong bit grip
  • Comfortable ergonomics with side handle and belt hook

Cons:

  • Battery and charger sold separately, adding to cost
  • Power boost depends heavily on using FLEXVOLT batteries
  • Can warm up during extended heavy-duty hammer drilling
  • Higher price point compared to some competitors
  • Standard maximum chuck size might limit some heavy applications

Additional information

Brand

DEWALT

Power Source

Battery Powered

Maximum Rotational Speed

2250 RPM

Voltage

20 Volts

Amperage

5 Amps

Maximum Chuck Size

12.7 Millimeters

Color

Multi

Included Components

(1) DCD999B 20V MAX* 1/2 in. Brushless Cordless Hammer Drill/Driver with FLEXVOLT® ADVANTAGE™; (1) 360° Side Handle; (1) Belt Hook

Special Feature

Cordless,Heavy-Duty

Product Dimensions

8.4\"L x 2.7\"W x 8.3\"H

Material

Blend

Number of Speeds

3

Speed

2000 RPM

Item Weight

3.54 pounds

Maximum Power

300 Watts

Drill Type

Hammer Drill

Battery Capacity

5 Amp Hours

Is Electric

Yes

UPC

885911684033

Drilling Capacity Wood

0.5 Inches

Manufacturer

DEWALT

Drilling Capacity Metal

0.5 Inches

Part Number

DCD999B

Item model number

DCD999B

Is Discontinued By Manufacturer

No

Size

One Size

Item Package Quantity

1

Special Features

Cordless,Heavy-Duty

Batteries Included

No

Batteries Required

Yes

Battery Cell Type

Lithium Ion

Contents