A professional side profile of the Klein Tools 44308 auto-loading retractable utility knife, featuring a rugged black housing, ergonomic thumb slide for blade extension, and a high-visibility orange quick-release button for the blade magazine.
An infographic labeled What’s Included, showcasing the retractable utility knife alongside its dual-sided magazine that holds up to 10 blades, including 5 standard straight blades and 5 specialized hook blades for heavy-duty cutting.
A comparison graphic demonstrating the ease of switching between a standard utility blade and a hook blade, highlighting the 1 and 2 markings on the knife body that allow for easy identification of which blade type is currently loaded.
A technical diagram illustrating the quick-release magazine system, showing how to slide the orange switch to unlock and eject the magazine, then flip and reload it to instantly transition from hook blades to standard utility blades.
Close-up detail of the auto-reload feature, showing the slide-forward motion that automatically chambers a fresh blade from the internal magazine for uninterrupted cutting on the jobsite.
An instructional graphic for tool-free blade replacement, demonstrating how the Klein Tools utility knife automatically reloads the next blade in the sequence when the previous one is removed or retracted.
A clean product shot of the 44308 utility knife against a white background, emphasizing the professional-grade construction, integrated tether hole for safety, and the high-leverage grip design for carpet, drywall, and roofing tasks.
Klein Tools Manufacturing promotional video
A professional side profile of the Klein Tools 44308 auto-loading retractable utility knife, featuring a rugged black housing, ergonomic thumb slide for blade extension, and a high-visibility orange quick-release button for the blade magazine.
An infographic labeled What’s Included, showcasing the retractable utility knife alongside its dual-sided magazine that holds up to 10 blades, including 5 standard straight blades and 5 specialized hook blades for heavy-duty cutting.
A comparison graphic demonstrating the ease of switching between a standard utility blade and a hook blade, highlighting the 1 and 2 markings on the knife body that allow for easy identification of which blade type is currently loaded.
A technical diagram illustrating the quick-release magazine system, showing how to slide the orange switch to unlock and eject the magazine, then flip and reload it to instantly transition from hook blades to standard utility blades.
Close-up detail of the auto-reload feature, showing the slide-forward motion that automatically chambers a fresh blade from the internal magazine for uninterrupted cutting on the jobsite.
An instructional graphic for tool-free blade replacement, demonstrating how the Klein Tools utility knife automatically reloads the next blade in the sequence when the previous one is removed or retracted.
A clean product shot of the 44308 utility knife against a white background, emphasizing the professional-grade construction, integrated tether hole for safety, and the high-leverage grip design for carpet, drywall, and roofing tasks.
Klein Tools Manufacturing promotional video
KLEIN TOOLS

Klein Tools Utility Knife 44308 Auto Loading Retractable Cutter (10 Blade Dual Sided Magazine Straight Hook Blades Drywall Carpet Roofing Support)

In stock
SKU: 44308
$21.98 USD

Description

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Klein Tools 44308 Auto-Loading Retractable Utility Knife

The Klein Tools 44308 is an auto-loading retractable utility knife with a dual-sided 10-blade internal magazine engineered to streamline drywall scoring, carpet trimming, and roofing material slicing. Designed for high-repetition material cutting, this knife holds five standard straight utility blades on one side of its magazine and five hook blades on the other for rapid switching between general cutting and specialty roofing tasks. An auto-reloading slide mechanism automatically feeds a fresh blade into the carriage upon fully retracting and ejecting a worn blade, while a quick-release ejection button enables tool-free magazine swaps on active construction sites.

Best Used For:

  • Drywall & Gypsum Board Scoring: Executing straight score lines on drywall panels using high-tolerance straight utility blades without body flex.
  • Roofing Shingle & Underlayment Trimming: Slicing asphalt shingles, felt paper, and synthetic roofing underlayment using the pre-loaded hook blades.
  • Resilient Flooring & Carpet Installation: Trimming thick rolled carpet, vinyl tile, and rubber underlayment with rapid blade replacement.

Key Performance & Safety Features

  • Dual-Sided 10-Blade Magazine: Houses five standard straight utility blades and five hook blades simultaneously for multi-material jobsite versatility.
  • One-Handed Auto-Reload Mechanism: Retracting the blade slider completely reloads a fresh blade directly from the magazine into the drive track.
  • Quick-Release Magazine Ejection: Dedicated release switch permits instant magazine removal for rapid blade flipping or replenishment.
  • Multi-Position Retractable Slider: Smooth thumb slider extends blade to variable cutting depths and retracts fully into the casing for safety.
  • Ergonomic High-Impact Housing: Ruggedized steel and composite frame withstands drops onto hard jobsite floors while maintaining blade alignment.
  • Complete Blade Starter Pack: Comes pre-packaged with five standard utility blades and five heavy-duty hook blades to begin work out of the box.

What's Included

  • (1) Klein Tools Auto-Loading Retractable Utility Knife (44308)
  • (5) Standard Straight Utility Blades
  • (5) Heavy-Duty Hook Blades
  • (1) Dual-Sided Removable Blade Magazine

Technical Specifications

Brand Manufacturer Klein Tools®
Model Part Number OEM SKU 44308
Internal Blade Storage Capacity 10 Blades Total (5 Straight / 5 Hook in Dual Magazine)
Overall Tool Length 6.80 inches (17.3 cm)
Blade Length Dimension 2.42 inches (2-27/64" / 6.1 cm)
Blade Width Dimension 0.75 inches (3/4" / 1.9 cm)
Blade Thickness Dimension 0.02 inches (1/50" / 0.5 mm)
Overall Tool Width 1.75 inches (1-3/4" / 4.4 cm)
Overall Tool Height 1.04 inches (1-3/64" / 2.6 cm)
Chassis Frame Metallurgy Structural Steel and High-Impact Composite Polymer
Operation Loading Mechanism Auto-Loading Carriage with Quick-Release Magazine
Assembled Net Tool Weight 6.4 oz / 0.40 lbs (181 g)
Global Trade Item Number GTIN 00092644443084

Pro-Tip: Press the front blade release button and pull out the dull blade completely before pulling the main thumb slider back; pulling the slider all the way back without a blade in the carriage automatically engages the internal magazine to chamber the next fresh edge without opening the tool frame.