Stanley 10-099 6-Inch Classic 99 Retractable Utility Knife Review

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Having a utility paper knife is handy for both households and outdoor enthusiasts. However, it is even more useful to have a highly flexible utility knife that has more than one blade and of different lengths. On top of this, how it would be if those blades are retractable? Well, this is exactly what the Stanley 10-099 classic utility knife offers!

It is a solidly built tool embracing an ingenious mechanism for storing and replacing the blades with just a simple screw holding its two halves together. The retractable, 3-position blade seems to be the biggest selling point that makes this tool superior to other knives that come with an open blade and require a sheath for safe storage. It can easily handle all home improvement and professional tasks.

In terms of usage, this knife is highly flexible and versatile. You can use it inside and outside the house for a variety of tasks. It can assist in building architectural models, sharpening pencils, cutting boxes, cutting holiday cartons, cutting corrugated cardboard, trimming and cutting papers with straight edges, and cutting plastic sheets.

It can even easily pass through heavy cardboard, vinyl sheet, styrofoam, concrete floor, wooden surface or wood such as balsa, and a hard forklift to face all the abuse and yet work smoothly for a long time. The credit goes to the razor-like sharp blade right out of the box and its adjustable ability. The length at which it juts out is flexible and adjustable. This means that when at the minimum length, you can open boxes safely.

Stanley 10-099 6-Inch Classic 99 Retractable Utility Knife

Features of Stanley 10-099

The 3-in-1 Retractable Blade

The three-position retractable blade is composed of carbon alloy steel. For the end-user, this means a truly razor-sharp edge, good hardness, strong construction, and edge retention for a long. This is because of the high quantity of carbon in the steel.

Measuring hardly an inch in length, this blade comes sharper and remains sharper than the normal heavy-duty counterparts. The presence of a 3-position blade indicates that you can easily control the cut’s depth as per the targeted item such a tape on the box or thicker material.

There are heavy-duty, utility three blades included, each of different lengths for performing a variety of trimming and cutting tasks safely. These blades are double-ended to form a total of six blades. So, for a while, you will not need any replacement, as all three lasts well. It is easy to replace these blades, as they are the standard type due to which you easily get the new ones.

What you will also admire is the way you can withdraw or extend the blade up to several different lengths. This is because this flexible mechanism is well made. You just need to apply thumb pressure on the slider for moving the blade. The moment you release the pressure, the blade stops moving and remains locked in its place. There are five notches between which the blade extends or retracts.

For holding the blade securely in its place, there is a patented interlocking nose. It joins the two halves for securing the blade and delivering stability.

The Grippy Handle with Storage

The three-position blade is easily stored in the handle for convenience. Yes, there is sufficient storage space in the handle to store spare blades. Made up of die-cast zinc, the sufficiently thick and well-contoured handle gives a sturdy feel when in the hand. It has a good weight and shape, both of which contribute to a safe, consistent grip that does not invite slippage.


  • Origin: U.S.A
  • Style: Retractable
  • Weight: 4.8 ounces
  • Color: Gray
  • Design: Classic utility
  • Overall Length: 6 inches
  • Blade Length: 2 7/16 inches
  • Blade: 3-position heavy-duty, utility, and retractable
  • Blade Material: Carbon alloy steel, hand-crafted
  • Blade Storage: In handle
  • Blade Lock: Interlocking nose
  • Handle Material: Die-cast zinc


  • Very sharp
  • Affordable


  • A bit time-consuming setup
  • A little wobbling on the sides

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The Stanley 6-Inch Classic 99 Retractable knife is a classic utility knife, which is suitable for artists, carpenters, and Do-It-Yourself (DIY) enthusiasts. However, it is more suited for occasional use to enjoy its lasting edge benefit. With the ease of use and blade swapping, the knife is reliable for around the house projects. Go for it if flexibility is what you require.