I bought this at walmart, but how do you lock the blade in the out position? (it's a nuisance to use while always having to push the spring forward.)

This is a safety feature. Slice has a similar model (10515), also available on Amazon, that does not retract and that model also has a locking feature.

Will this cut fabric?

I haven't tried, but it probably would. Not as precise as scissors, but it's pretty sharp.

How do you "lock" the blade in the OUT position?

It does not lock, but there is a little recessed push tab on opposite side of the logo that prevents the blade slider and blade from retracting if you apply pressure to the push tab when the blade is fully extended. However, it may just be easier to hold the blade slider to the desired position when operating. The push tab is a little to small for my fingers to effectively operate.

What size of slice blades do I get for replacement in this knife?

I'm ordering the knife, but will hold off on the extra blades, as HarleyGirl2002 says the [10404/10408] blades will not fit. The correct replacement blade appears to be Westcott 16510 (https://www.amazon.com/Westcott-Safety-Ceramic-Replacement-16510/dp/B019O2UE8M/), but "currently unavailable". The Westcott 16510 blades have 2 notches, and the image of the 16510 package back confirms, "They will work with all Westcott ceramic tools (16473, 16474, 16475)." In comparison, the Slice 10404 and 10408 blades have only one notch.

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Westcott Ceramic Safety Knife

Product ID: 709659104

Details

Blade Material
Ceramic
Brand
Westcott
Colour
Full Size
Handle Material
Plastic
Item Length
3.5 Inches
Item Weight
5 g

📏3.5-inch compact size

🔒Retractable blade for safe storage

🗃️Cuts largest boxes effortlessly

Description

✂️ Cut through clutter, not style — your sleek slicing sidekick!

DURABILITY THAT LASTS - Trusted by thousands with a 4.5-star rating and proven performance over years of use.
EFFORTLESS BOX OPENING - Tackle even the largest packages with ease—no more struggling or damaging contents.
PRECISION CERAMIC BLADE - Experience ultra-sharp, rust-resistant cutting power that stays sharp longer than steel.
COMPACT POCKET FRIENDLY - At just 3.5 inches, this sleek cutter fits seamlessly into your daily carry—office or home.
SAFETY FIRST RETRACTABLE DESIGN - Slide the blade away instantly for secure storage and worry-free transport.

The Westcott Ceramic Safety Knife is a full-size, 3.5-inch retractable utility cutter featuring a durable ceramic blade designed to slice through the largest boxes safely and efficiently. Its compact, pocket-friendly design and retractable blade make it ideal for both home and office use, backed by thousands of positive reviews praising its quality and longevity.

Specifications

ASIN	B019O2UBE4
Blade Material	Ceramic
Brand	Westcott
Brand Name	Westcott
Colour	Full Size
Country of Publication	USA
Customer Reviews	4.5 out of 5 stars 2,678 Reviews
Global Trade Identification Number	00073577164758
Handle Material	Plastic
Handle Type	Manual-Retractable
Included Components	Westcott Safety Knife
Item Length	3.5 Inches
Item Weight	0.01 Pounds
Manufacturer	ACME United Corporation
Material	Ceramic
Material Type	Ceramic
Product Style	Full Size
UPC	073577164758
Unit Count	1.0 Count

Reviews

A**O

Qualidade

Produto de acordo com o anúncio. Material de ótima qualidade. Recomendo

25.02.2026

J**4

Better than expected even after 2.5 yrs!

28.01.2026

L**Z

Works great

1.03.2026

S**O

Recomendo

Perfeito como eu imaginava

1.09.2025

J**E

Idea great. Execution slightly flawed.

21.08.2025

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