Flex 24V Power Tools: The New Pro-Focused Lineup Worth Knowing About

Introduction

Flex entered the cordless power tool market with a clear target: professional contractors, not casual users. The launch wave brought 26 new tools, four new lithium-ion batteries and two fast chargers, all sold exclusively through Lowe’s. The lineup leans heavily on battery technology, and the brand has backed buyers with a Founders lifetime warranty that was extended from the end of 2021 to the end of 2022, a signal that Flex is willing to stand behind its tools.

This roundup covers the highlights of that launch: the Stacked Lithium battery platform, the 7-1/4” rear handle circular saw, a one-handed reciprocating saw, the impact driver, hammer drill, grinder, the Stack Pack storage system and the tripod light.

Stacked Lithium Batteries: The Core of the Platform

Battery technology is the headline here. Flex trademarked its “Stacked Lithium” flat cell technology, and the claims are aggressive. The 3.5Ah battery is said to produce as much power as a typical 18V or 20V 8Ah pack built on 21700 cells, while the 6Ah version is claimed to out-power 12Ah 18V and 20V packs. A 10Ah battery tops the range.

Flex also promises longer battery life and faster charging, two traits that rarely appear together. The cells are a co-developed design rather than existing pouch cells, built over five years of R&D specifically for job site wear and tear, with a patent-pending cushioning feature and proprietary Thermatec Plus technology that absorbs heat and impacts.

Flex’s parent company, Chervon, has a strong battery track record through its EGO outdoor power equipment, which is popular enough that e-bike and one-wheel modification communities have adopted those packs. That background lends some credibility to the battery-first approach, even if independent testing is still the final word.

7-1/4” Rear Handle Circular Saw: The Workhorse

This is arguably the most exciting tool in the launch. Flex’s parent company also owns Skilsaw, a brand with years of experience building pro-grade circular saws, so a strong rear handle saw was almost a foregone conclusion.

In a head-to-head race against Makita (36V, two 5Ah batteries) and Milwaukee (18V, 12Ah), the Flex saw, running a 10Ah Stacked Lithium pack, came out on top. All saws used identical new Flex 24-tooth carbide-tipped blades, and the human element was removed from the test. The deciding factor came down to raw watts.

One caveat: DeWalt, a leader in this category, was absent from the comparison, and Skilsaw itself was missing for the same obvious reason. Still, for framers and general contractors, this saw is one of the easiest recommendations in the lineup.

One-Handed Reciprocating Saw: The Sleeper Hit

The one-handed reciprocating saw drew genuine enthusiasm, with dual lights adding to its appeal. If it performs anything like the company’s other saws, it could be one of the standout tools in the lineup. For plumbers, electricians and anyone who works in tight spaces, a compact one-handed recip saw is a genuinely useful category, and this one generated more excitement than most of the launch.

Impact Driver and Hammer Drill: Head-to-Head Winners

The Flex 24V impact driver and hammer drill were both pitted against three competitors, including DeWalt’s PowerStack-equipped models, and Flex claimed the wins in both events. As with any brand-hosted comparison, the matchups were chosen where the tools were expected to perform well, so treat the results as encouraging rather than definitive.

Both tools fit the pro-focused brief: high performance, durable construction, and the 24V Stacked Lithium platform underneath. They are sensible picks for anyone already considering the platform.

Grinder: A Confirmed Favorite

The grinder is the tool with real hands-on credibility here. Flex sent out early units after the brand first launched, including a grinder that has seen actual use, and the verdict was straightforward: the grinder is fantastic and the vibration control technology is top-notch. It also won its head-to-head event, including against a DeWalt running the PowerStack pack, making for an interesting stack-versus-stack matchup.

Stack Pack Storage: Tough, Modular, But Missing Pieces

The Stack Pack is an interlocking modular storage system with an IP65 rating, meaning it keeps out dust and handles light to medium water jets, suitable for rain in a truck bed but not full immersion. Features include auto-connect interlocking, gas struts for auto-opening lids, 9-inch all-terrain tires, customizable organization, extendable exterior and interior storage, and a detachable hand rail that lets it slide under a pickup truck tonneau cover. It survived a baseball fired from a pitching machine at about 60 mph.

The system launches with a range of attachments: a three-cavity battery holder, adjustable charger holder, level holder, cord wrapper, connectors and a tool rack rail. Flex’s fan tool also snaps into the locking system.

The criticism is fair, though: competitors offer drawer systems, open clear-top organizers and crates that the Stack Pack lineup does not yet include. It is a good-looking, well-built system, but calling it complete would be a stretch.

Tripod Light and the Rest of the Lineup

The tripod light looks strong, with the power housed in the head and dual-power capability, but it lands in a category where every major brand already competes. A job site blower with rafter hooks rounds out the accessories. Both are useful, neither is the kind of headline product that drives a platform switch.

Buying Advice

The overall verdict on the launch is a mixed but hopeful one. The batteries, the rear handle circular saw, the one-handed recip saw and the grinder are the genuine standouts, and the extended lifetime warranty makes switching easier for contractors. The main concern is pace: Flex has promised a hundred-plus tools, and this wave delivered mostly accessories with a handful of tools, so buyers committing to the platform should expect the lineup to grow over time.

For professional users, the smartest entry points are the Stacked Lithium batteries and the circular saw. The grinder is a proven performer for anyone already in the ecosystem.

Conclusion

Flex’s pro-focused 24V platform shows real promise where it matters most: battery technology and saws backed by serious parent-company engineering. The storage system and site lighting are solid but not revolutionary, and the full tool lineup still has ground to cover. If you are a contractor considering a platform switch, the extended lifetime warranty and the battery claims make Flex worth a serious look, with the caveat that the ecosystem is still expanding.