Flex · Updated July 2026
Flex FX3171A-Z 24V 5 in. Variable Speed Brushless Angle Grinder with Paddle Switch (Tool Only): price & specs
The Flex FX3171A-Z 24V 5 in. Variable Speed Brushless Angle Grinder with Paddle Switch (Tool Only) costs $199, #14 cheapest of 18 angle grinders (median $149). It earns a Bronze Deskmark — 47/100 pay-blind standing, #11 of 17 in class.
Verified Jul 10, 2026 · figures linked to their source in the table below
- Best for Impressive power and fast material removal for the 5-inch class; Slimmer, ergonomic handle with secure overmolded grip.
- Skip if No fast electronic brake; wheel coasts ~2.5s after release is a dealbreaker.
Flex FX3171A-Z 24V 5 in. Variable Speed Brushless Angle Grinder with Paddle Switch (Tool Only). Every price and spec below is linked to its source and dated — no guesses.
Source: flexpowertools.com verified ✓ corroborated verify in ledger
Is the Flex FX3171A-Z 24V 5 in. Variable Speed Brushless Angle Grinder with Paddle Switch (Tool Only) a good buy?
At $199, the Flex FX3171A-Z 24V 5 in. Variable Speed Brushless Angle Grinder with Paddle Switch (Tool Only) is #14 cheapest of the 18 angle grinders we track, where the median is $149. On the spec sheet, its disc size of 5 in is above the median of the 18, its weight of 4.2 lb is below the median of the 17, and its max of 10000 rpm is at the median of the 18.
Evidence of Record
Our data- Independent labsmeasured it
- 1
- Physical metricsrecorded
- 2
- Outlets on recordall tested
- 1
One independent lab measured this product across 2 physical metrics — brake coast-down time and battery. These numbers rest on a single hands-on source so far.
Review consensus · sourced & dated
What reviewers say about the Flex FX3171A-Z 24V 5 in. Variable Speed Brushless Angle Grinder with Paddle Switch (Tool Only)
Only one whitelisted tester, Pro Tool Reviews, hands-on tested this exact Flex FX3171A variable-speed paddle-switch 5-inch grinder (scored 9.5/10). PTR praised its class-leading power, slimmer ergonomic handle and easy one-step guard adjustment, but flagged the lack of a fast electronic brake.
Tested by Pro Tool Reviews
Consistently praised
- Impressive power and fast material removal for the 5-inch class
- Slimmer, ergonomic handle with secure overmolded grip
- Easy, one-step guard adjustment and anti-kickback sensor
Commonly flagged
- No fast electronic brake; wheel coasts ~2.5s after release
- Noticeably easier to bog down the wheel on the smaller 2.5Ah battery
Where reviewers disagree Only a single whitelisted hands-on review exists, so no cross-source comparison is possible; PTR's 9.5/10 verdict stands unchallenged.
The sources (1)
Brake coast-down time (Type 27 grinding wheel): about 2.5 sec · Weight (bare tool with side handle, no battery): 4.3 lbs · Weight (with 5.0Ah battery): 6.4 lbs
The power level is impressive for this class.
This Flex cordless grinder makes guard adjustments as easy as it comes.
Despite that control, there's no fast electronic brake when you release the switch.
Specifications
| Price (US) | $199 Current retail at Ohio Power Tool ($199.00, tool only); FLEX product page does not display MSRP. |
|---|---|
| Brand | Flex |
| Released | — |
| Disc size (in) | 5 in |
| Power source | cordless |
| Amps or voltage | 24 V |
| Max (rpm) | 10000 |
| Brushless | Yes |
| Switch type | paddle |
| No volt release | — |
| Weight (lb) | 4.2 |
Source: flexpowertools.com (verified 2026-07-10) · corroborated by ohiopowertool.com. The official FLEX product page lists FX3171A-Z explicitly as the "Tool Only" configuration of the 5" Variable Speed Angle Grinder with Paddle Switch, confirming exact model identity, and states the Sensor-Free brushless motor, 24V, 4-1/2 - 5 in wheel diameter (5 in), No-Load Speed of 3,500/5,000/7,000/10,000 RPM (up to 10,000 RPM), Paddle Switch No-Lock, and Tool Weight without battery of 4.2 lbs. Ohio Power Tool corroborates MPN FX3171A-Z, 5" diameter, 24V cordless, and the $199.00 tool-only price. No-volt release is not documented as a term/feature (paddle no-lock switch only) so it is null; no release date is published.
Is the Flex FX3171A-Z 24V 5 in. Variable Speed Brushless Angle Grinder with Paddle Switch (Tool Only) worth it vs cheaper angle grinders?
Flex FX3171A-Z 24V 5 in. Variable Speed Brushless Angle Grinder with Paddle Switch (Tool Only) against its closest cheaper and pricier angle grinders on the specs that matter — every value sourced. See all 18 ranked →
| Product | Price | Disc size (in) | Power source | Amps or voltage | Max (rpm) | Brushless |
|---|---|---|---|---|---|---|
| Flex FX3171A-Z 24V 5 in. Variable Speed Brushless Angle Grinder with Paddle Switch (Tool Only) this | $199 | 5 in | cordless | 24 V | 10000 | Yes |
| DeWalt DWE43144N 6 in. 13 A E-Clutch Paddle Switch Corded Angle Grinder (No Lock-On) | $188 | 6 in | corded | 13 A | 9000 | No |
| Milwaukee M18 FUEL 2880-20 4-1/2 in./5 in. Grinder Paddle Switch No-Lock (Tool Only) | $229 | 5 in | cordless | 18 V | 8500 | Yes |
Frequently asked questions
What do reviewers say about the Flex FX3171A-Z 24V 5 in. Variable Speed Brushless Angle Grinder with Paddle Switch (Tool Only)?
Only one whitelisted tester, Pro Tool Reviews, hands-on tested this exact Flex FX3171A variable-speed paddle-switch 5-inch grinder (scored 9.5/10). PTR praised its class-leading power, slimmer ergonomic handle and easy one-step guard adjustment, but flagged the lack of a fast electronic brake. Praised: Impressive power and fast material removal for the 5-inch class; Slimmer, ergonomic handle with secure overmolded grip; Easy, one-step guard adjustment and anti-kickback sensor. Flagged: No fast electronic brake; wheel coasts ~2.5s after release; Noticeably easier to bog down the wheel on the smaller 2.5Ah battery. (From 1 tester review, 1 lab-tested.)
How much does the Flex FX3171A-Z 24V 5 in. Variable Speed Brushless Angle Grinder with Paddle Switch (Tool Only) cost?
The Flex FX3171A-Z 24V 5 in. Variable Speed Brushless Angle Grinder with Paddle Switch (Tool Only) has a US price of $199 (Current retail at Ohio Power Tool ($199.00, tool only); FLEX product page does not display MSRP.), as of 2026-07-10.
How does the Flex FX3171A-Z 24V 5 in. Variable Speed Brushless Angle Grinder with Paddle Switch (Tool Only) compare on price?
At $199, the Flex FX3171A-Z 24V 5 in. Variable Speed Brushless Angle Grinder with Paddle Switch (Tool Only) is #14 cheapest of the 18 angle grinders we track, where the median is $149.
What are the Flex FX3171A-Z 24V 5 in. Variable Speed Brushless Angle Grinder with Paddle Switch (Tool Only)'s key specs?
Flex FX3171A-Z 24V 5 in. Variable Speed Brushless Angle Grinder with Paddle Switch (Tool Only) (Flex): disc size in 5 in, power source cordless, amps or voltage 24 V, max rpm 10000, brushless Yes. Full sourced spec sheet verified 2026-07-10.
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Compare with
Cheaper angle grinders
- DeWalt DWE43144N 6 in. 13 A E-Clutch Paddle Switch Corded Angle Grinder (No Lock-On) $188
- Makita XAG04Z 18V LXT Brushless 4-1/2 in./5 in. Cut-Off/Angle Grinder (Tool Only) $179
- Bosch GWS13-50 5 in. Corded Angle Grinder $159
- Bosch GWS18V-45 18V 4-1/2 in. Cordless Angle Grinder (Bare Tool) $139
- Makita GA5052 4-1/2 in./5 in. Paddle Switch Corded Angle Grinder (AC/DC) $129
- DeWalt DWE402 4-1/2 in. Small Angle Grinder $117
Step up
- Milwaukee M18 FUEL 2880-20 4-1/2 in./5 in. Grinder Paddle Switch No-Lock (Tool Only) $229
- Metabo WEV15-125 Quick 4-1/2 in./5 in. 13.5 A Variable Speed Corded Angle Grinder $239
- Milwaukee M18 FUEL 2980-20 4-1/2 in./6 in. Braking Grinder Paddle Switch No-Lock (Tool Only) $249
- DeWalt DCG415B 20V MAX XR Brushless 4-1/2 in./5 in. Small Angle Grinder with POWER DETECT (Tool Only) $279