3/8" Stapler
FX4521-1A

3/8" Stapler

FX4521-1A

Power through job after job without the hassle of hoses and compressors with the FLEX 24V Brushless 3/8” Stapler, which drives up to 3 staples per second with zero ramp up. Read More

Includes: (1) 3/8“ Stapler [FX4521], (1) Onboard screen attachment, (1) 24V 2.5Ah Lithium-Ion Battery [FX0111], (1) 24V 160W Fast Charger [FX0411], (1) Belt Clip, (1) Soft Bag

Features

THE FLEX ADVANTAGE

20% more power with 24V lithium, 25% longer runtime with THERMA-TECH™ heat management, up to 50% faster charging with high-power, dual fan chargers

FLEX ADVANTAGE
*RUNTIME

EXTENDED RUNTIME

Drives up to 5,000 staples on a single charge with a 2.5Ah battery

HIGH-SPEED POWER

Drives up to 3 staples per second with zero ramp up time

*HIGH SPEED POWER
POWER ADJUSTMENT DIAL

POWER ADJUSTMENT DIAL

Easily sets ideal stapling depth

DUAL WORKLIGHT

Dual LEDs light up dark areas

DUAL WORKLIGHT
*COMPACT AND LIGHTWEIGHT

COMPACT AND LIGHTWEIGHT

Conquers tight spaces and minimizes fatigue

DRY FIRE LOCKOUT

Eliminates blank firing after staple supply exhausted

*DRY FIRE LOCKOUT
LIFETIME WARRANTY

FLEX LIMITED LIFETIME WARRANTY

Register your new FLEX tool, battery, or charger within 30 days of purchase through December 31, 2024 to receive a limited lifetime warranty

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. It’s all protected by the FLEX Limited Lifetime Warranty when registered within 30 days of purchase at registermyFLEX.com through December 31, 2024.

Specs

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

Available Configurations

3/8

3/8" Stapler

FX4521-1A

Includes: (1) 3/8“ Stapler [FX4521], (1) Onboard screen attachment, (1) 24V 2.5Ah Lithium-Ion Battery [FX0111], (1) 24V 160W Fast Charger [FX0411], (1) Belt Clip, (1) Soft Bag

3/8

3/8" Stapler (Tool Only)

FX4521-Z

Includes: (1) 3/8“ Stapler [FX4521], (1) Onboard screen attachment, (1) Belt Clip

GET EVEN MORE POWER WITH THE

16Ga Angled Finish Nailer

FX4321A-1A
Power through job after job without the hassle of hoses and compressors with the FLEX 24V Brushless 16Ga Angled Finish Nailer, which drives up to 3 nails per second with zero ramp up.
16Ga Angled Finish Nailer

Accessories

Nailer/Stapler Air Refill Kit

Nailer/Stapler Air Refill Kit

FT433
Learn More
24V 2.5Ah LITHIUM-ION BATTERY

24V 2.5Ah LITHIUM-ION BATTERY

FX0111-1
Learn More
24V 5.0Ah LITHIUM-ION BATTERY

24V 5.0Ah LITHIUM-ION BATTERY

FX0121-1
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24V 8.0Ah LITHIUM-ION BATTERY

24V 8.0Ah LITHIUM-ION BATTERY

FX0221-1
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24V 12.0Ah LITHIUM-ION BATTERY

24V 12.0Ah LITHIUM-ION BATTERY

FX0231-1
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24V 160W FAST CHARGER

24V 160W FAST CHARGER

FX0411-Z
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24V 280W RAPID CHARGER

24V 280W RAPID CHARGER

FX0421-Z
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24V 3.5Ah STACKED LITHIUM BATTERY

24V 3.5Ah STACKED LITHIUM BATTERY

FX0321-1
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24V 6.0Ah STACKED LITHIUM BATTERY

24V 6.0Ah STACKED LITHIUM BATTERY

FX0331-1
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24V 10.0Ah STACKED LITHIUM BATTERY

24V 10.0Ah STACKED LITHIUM BATTERY

FX0341-1
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24V 550W SUPER CHARGER

24V 550W SUPER CHARGER

FX0431-Z
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*24V 5.0Ah LITHIUM-ION STARTER KIT

24V 5.0Ah LITHIUM-ION STARTER KIT

FX0411-1C
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24V STACKED-LITHIUM STARTER KIT

24V 6.0AH STACKED LITHIUM STARTER KIT

FX0421-1H
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1120W 4-PORT SIMULTANEOUS RAPID CHARGER

1120W 4-PORT SIMULTANEOUS RAPID CHARGER

FX0451-Z
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24V 3.5Ah STACKED LITHIUM STARTER KIT

24V 3.5Ah STACKED LITHIUM STARTER KIT

FX0411-1F
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24V 2.5Ah Lithium-Ion Starter Kit

24V 2.5AH LITHIUM-ION STARTER KIT

FX0411-1A
Learn More

UNRELENTING POWER #FLEXISWHATSNEXT

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