FLEX · FX4521-1A
3/8 Stapler
FLEXMODEL FX4521-1A

3/8 Stapler

STAPLER
COMMUNITY RATING
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FASTENER SIZE1/4" - 9/16"
POWER / PLATFORMFLEX 24V
WEIGHT2.76 lbs
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WHERE TO BUY

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Recorded Oct 7, 2026 · not a live quote

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PRODUCT DETAILS

DESCRIPTION

Power through installing Tyvek wrap, carpeting, and other jobs with the FLEX 24V Brushless 3/8” Stapler. This cordless stapler delivers high-speed power by driving up to 3 staples per second with zero ramp up time. It drives up to 5,000 staples on a single charge with a 2.5Ah lithium-ion battery for extended runtime. The staple gun features a power adjustment dial to easily set the ideal depth when driving fasteners, and its dual LED worklight delivers better visibility in dark work areas. The cordless staple gun toggles between bump and sequential firing modes and has a staple indicator to easily see how many staples remain in the magazine. Dry-fire lockout avoids blank firing and damage to your work when the staple supply is exhausted. The cordless stapler is compact and lightweight to conquer tight spaces with minimal fatigue. Its belt clip can be mounted on either side of the tool and features a lead-in profile. The stapler accepts 3/8-inch crown size fasteners. This cordless stapler delivers the FLEX Advantage of unmatched battery power, runtime, and fast charging. Kit includes the 3/8-inch stapler, 2.5Ah lithium battery, 160W Fast Charger, belt clip, (3) no-mar tips, and a FLEX bag.

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FEATURES

THE FLEX ADVANTAGE EXTENDED RUNTIME HIGH-SPEED POWER POWER ADJUSTMENT DIAL DUAL WORKLIGHT COMPACT AND LIGHTWEIGHT DRY FIRE LOCKOUT FLEX 5-YEAR LIMITED WARRANTY

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SPECIFICATIONS

PRODUCT

Brand
FLEX
Model / SKU
FX4521-1A
Category
Power Tools
Product type
Stapler
Power source
Cordless
RECORDED PRICES

PRICE HISTORY

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COMMENTS

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TECHNICAL DETAILS
Driving Mechanism
Mechanical Spring · Source ↗
Fastener Crown Size
3/8 in · Source ↗
Fastener Length
1/4" - 9/16" · Source ↗
Fastener Angle
0° · Source ↗
Operation Mode
Bump/Sequential · Source ↗
Max. Firing Speed
3 · Source ↗
Magazine Type
Hollowed-out · Source ↗
Magazine Loading Style
Bottom Loading · Source ↗
Magazine Max. Capacity
89 · Source ↗
Magazine Angle
0° · Source ↗
Magazine Material
Metal · Source ↗
Tool Weight
2.76 lbs · Source ↗
Tool Length
7.07 in · Source ↗
Tool Width
2.91 in · Source ↗
Tool Height
7.52 in · Source ↗
ABOUT THIS RECORD

RELEASE & SOURCE DATA

Release evidence
Not checked
Release confidence
Unknown

Type classification: mapped from official product type. Original category names are retained in the specifications.

Last catalog observation: 2026-10-07

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Battery platform and system labels describe the source listing. Check the manufacturer’s compatibility notes before combining products. A listing status is not a live stock check.

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Product reference: FLEX FX4521-1A

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