Stanley 99E Classic Retractable Utility Knife (10-099)
Stanley's original retractable utility knife: a die-cast zinc body, a nose that locks the blade in place, and room for spare blades inside the handle.
Quick verdict
Yes, if you want a durable everyday knife for boxes, carpet and drywall. The Stanley 99E is a die-cast zinc retractable knife that stores up to 10 spare blades in its handle and takes cheap standard utility blades. Changing a blade takes a screwdriver, and it doesn't fold into a pocket.
- Best for:
- Boxes, carpet and drywall, for years.
- Watch out:
- Blade changes need a screwdriver.
Amazon US listing and availability checked October 26, 2026. Prices and stock can change.
Reviewed October 17, 2026 · How we review
Our Take
The 99E is the utility knife most toolboxes already have, and there's a reason it has stayed in Stanley's line-up since 1952. Stanley sells the 10-099 as the 99E Classic: a die-cast zinc body, a retractable blade you set with a thumb slider, and an InterLock nose that holds the blade firmly so it doesn't wobble during a cut. You open the body with one screw, and the handle stores up to 10 spare blades. It comes with three standard Stanley blades and takes ordinary utility blades, so replacements are cheap and easy to find. The trade-offs are the screw (changing a blade takes a screwdriver and a minute) and the size: it doesn't fold, so it's less pocket-friendly than a folding knife. We haven't tested it ourselves.
Specs (This Configuration)
- Body
- Die-cast zinc (Stanley)
- Blade
- Retractable; InterLock nose holds it in place (Stanley)
- Storage
- Up to 10 spare blades in the handle (Stanley)
- Included
- 3 standard utility blades, 11-921 (Stanley)
- Length
- 6 in. (Stanley)
Best For
- Cutting cardboard, carpet, drywall and packaging
- A toolbox or garage knife that lasts
- Anyone who wants cheap, standard replacement blades
Skip If
- You want a knife that folds into a pocket
- You change blades often and want tool-free changes
- You need a precision craft knife
What We Like
- Metal body that takes years of use
- Blade locks firmly in the nose
- Spare blades stored inside
What To Know
- Changing the blade takes a screwdriver
- Doesn't fold
- Stanley's US page lists no warranty information for this knife
Pros
- Sold by Amazon.com on the listing we checked
- Uses standard utility blades
- Simple design with few parts to break
Cons
- Not pocket-friendly
- No quick-change blade
- No belt clip
Alternatives
- Milwaukee Fastback 48-22-1502 — A folding utility knife that opens with one hand and changes blades without tools.View on Amazon
- Leatherman Skeletool CX — A light multi-tool with a fixed knife blade, pliers and bit driver, for carrying every day.
Why PriceDropIQ Selected It
A good utility knife is the tool you reach for most when opening boxes, cutting carpet or scoring drywall. The 99E is simple, made of metal, and takes cheap standard blades that you can find anywhere. If you want a knife that folds into a pocket or changes blades without a screwdriver, a folding knife like Milwaukee's Fastback suits you better.
Before You Buy
- Check the model: Stanley 10-099 Classic 99, the 99E
- Check that the seller is Amazon.com
- Buy a pack of spare blades; three come in the box
Frequently Asked Questions
Is the 10-099 the same as the 99E?
Yes. Stanley's US page lists the 10-099 as the 99E Classic Retractable Blade Utility Knife.
How many spare blades fit inside?
Stanley says the handle stores up to 10 blades. Three standard blades come with the knife.
Can I change the blade without tools?
No. The body is held together by one screw, so you need a screwdriver to open it and swap the blade.
What replacement blades fit the Stanley 99E?
It comes with three Stanley 1992 heavy-duty utility blades (11-921), and Stanley's US page lists 11-921 blade packs, from 5 to 400 blades, alongside the knife.
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Reviewed October 17, 2026. Check the current offer, seller, availability, and shipping details on Amazon.
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Product photo by TaurusEmerald (CC BY-SA 4.0). Full image credit