Flex
Flex 24V FX2141 Circular Saw
Flex's 24V in-line sidewinder is one of the sleeper hits of the cordless saw world: 5,800 RPM, a 2-5/8 in depth of cut that clears 3x lumber in one pass, and Pro Tool Reviews' 9.5/10 'elite cutting performance' verdict. The balanced in-line design gives a clear view down both sides of the blade, and with a 10.0Ah Stacked Lithium pack Flex claims up to 610 cuts in 2x4 lumber. Magnesium footplate and guards keep it durable without the bulk.
Specifications
Features
Pros
- ✓Elite cutting power — Pro Tool Reviews scored it 9.5/10, noting it never bogged or dropped speed in cross or bevel cuts and hung with the best pro saws in speed testing.
- ✓5,800 RPM no-load speed is near the top of the class, leaving clean edges at full feed rates.
- ✓2-5/8 in depth of cut at 90° matches the deepest sidewinders and clears 3x lumber in a single pass.
- ✓Balanced in-line design gives a clear view down both sides of the blade — unusually good cutline visibility for a sidewinder.
- ✓Outstanding runtime — up to 610 cuts in 2x4 lumber per charge with the 10.0Ah Stacked Lithium battery.
- ✓Complete feature set: electric brake, LED light with cutline blower, rafter hook, arbor lock with onboard wrench storage, and an included vacuum adapter.
- ✓Owners at Lowe's rate the kit 4.8/5 across 631 reviews — among the best-reviewed cordless saws at any price.
- ✓5-year warranty on both tool and battery beats the 3-year pro-brand standard, and magnesium footplate and guards shrug off drops.
Cons
- ✗Heaviest saw in its class once you mount big packs — 12.7 lbs with the 10Ah Stacked Lithium battery (vs 9.0 lbs bare).
- ✗The engraved depth gauge sits on the inside of the upper blade guard, making depth setting trial-and-error (Pro Tool Reviews' main gripe).
- ✗Flex's 24V line is Lowe's-centric with a smaller tool catalog than DeWalt/Milwaukee — platform buy-in is a bigger bet.
- ✗Needs Stacked Lithium packs to hit peak performance numbers, and those batteries are expensive.
- ✗$399 for the 10Ah kit is a big step up from value rivals like Ridgid's $249 kit.
- ✗24V batteries are proprietary to Flex — zero cross-compatibility with any other platform.
- ✗No track or guide-rail compatibility, unlike Bosch's ProFactor saw.
- ✗The launch-era Founders lifetime warranty is long gone; the 5-year coverage requires registration.
Compare the Flex 24V FX2141 Circular Saw
Related tools
More from Flex →
Third generation of Metabo HPT's MultiVolt sidewinder (superseding the award-winning C3607DA), "The Stud" spins at 6,000 RPM and adds a Torque Boost button that drops to 4,300 RPM while redirecting power into 40% more torque for LVL and dense engineered lumber. It was the fastest of twelve saws through double-stacked 3/4-in OSB in Pro Tool Reviews' 2026 shootout, and like all MultiVolt tools it can run corded via the ET36A AC adapter.
DeWalt's FlexVolt 60V worm-style-power sidewinder, the saw that made corded 7-1/4 in saws optional for framing crews. FlexVolt batteries auto-switch between 20V and 60V, so packs bought for this saw also run every 20V Max tool.
Bosch's flagship ProFactor sidewinder pairs a BiTurbo brushless motor with an onboard HMI offering six speed settings (2,500-5,000 RPM) and an Eco mode that stretches runtime up to 30%. Its party trick is a base that rides Bosch and select third-party guide rails with no adapter, and it keeps full 2x cut capacity across the entire 0-50° bevel range. One-touch depth adjustment, an electronic brake, and a 360° pivoting dust port round out a genuinely corded-class package.