What's the secret to removing the old blade and inserting a new one? Does it slide in and out from the back end?

I've never had to remove the old blade and replace it. I just use pliers to snap off the dulled little piece which reveals a new, sharp edge. Once the whole blade is used up, I usually just toss it. I don't know if it's replaceable or not.

What do you do when it jams after you replaced the blade? This didn’t happen the first time I replaced the blade

Just take it apart and clean it with soap and water and a small brush (like a toothbrush). This is a precision made tool, and by and far the best in it's class I might add. The specs are tight, so if a little debris (such as dirt or pocket lint), gets into the sliding track grooves, it can block the blade from extending. Remember to air dry the parts separately before re-assembling. With proper cleaning and care, this high quality, heavy duty tool will dutifully serve you for a lifetime. I keep this very model on me at all times (L-500GRP).

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NT Cutter Heavy-Duty Aluminum Die-Cast Anti-Slip Contoured Grip Screw-Lock Utility Knife (L-550GP)

Product ID: 254862993

Details

Brand
NT Cutter
Colour
grey
Handle material
Aluminum
Item length
1.8
Material
Stainless

🔒Secure screw-lock blade system

🔪18mm ultra-sharp carbon steel blade

🛠️Aluminum die-cast anti-slip contoured grip

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VT10123

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In stock

Sold byAmazon VanuatuDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔧 Cut sharp, grip smart, work sustainably!

SAFETY FIRST DESIGN - Innovative screw-lock system secures the blade firmly, while the built-in blade snapper offers quick, safe blade disposal.
ERGONOMIC GRIP MASTERY - Contoured aluminum die-cast handle with anti-slip texture ensures maximum control—even with gloves on.
PRECISION CUTTING POWER - Snap-off carbon steel blade engineered for ultimate sharpness and edge retention, perfect for professional-grade projects.
ECO CONSCIOUS CRAFTSMANSHIP - Made from 100% post-consumer recycled materials with a durable electrical-acrylic metal coating for water resistance.
VERSATILE INDUSTRIAL UTILITY - Cuts through cardboard, rubber, leather, linoleum, carpet, and more—ideal for DIY, construction, and warehouse pros.

The NT Cutter L-550GP is a premium Japanese-made heavy-duty utility knife featuring an 18mm carbon steel snap-off blade, an ergonomic aluminum die-cast anti-slip grip crafted from recycled materials, and a secure screw-lock system. Designed for professionals demanding precision, safety, and eco-conscious durability across diverse cutting tasks.

Specifications

ASIN	B009F6C9F4
Best Sellers Rank	#47,817 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #158 in Utility Knives
Blade Material	ALUMINUM
Blade material	ALUMINUM
Brand	NT Cutter
Brand Name	NT Cutter
Color	grey
Colour	grey
Country of Publication	Japan
Customer Reviews	4.7 out of 5 stars 1,806 Reviews
Global Trade Identification Number	00030203900357
Handle Material	Aluminum
Handle Type	Manual-Retractable
Handle material	Aluminum
Item Length	1.8 Centimeters
Item Weight	0.24 Pounds
Item length	1.8 Centimeters
Manufacturer	NT Incorporated
Material	Stainless Steel
Material Type	Stainless Steel
Product Style	Aluminum Die-Cast Anti-Slip Contoured Grip with Screw-Lock
UPC	030203900357
Unit Count	1 Count

Reviews

A**W

Sharp Blade but Disappointing Quality for the Price

13.10.2025

C**Y

Great Product

7.08.2019

G**T

Top rien à dire

Bonne prise en main super robuste

19.12.2025

C**N

Favourite box cutter

15.11.2024

S**R

Amazing design, the most ergonomic cutter on a market

5.04.2025

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