Set of 18 and 9mm Olfa universal upholstery knives - An indispensable set for precise cutting
Are you looking for a reliable, sharp and versatile tool for your creative projects, home renovations or everyday tasks in the workshop? The 18 and 9mm Olfa Universal Upholstery Knife Set (SKU: 2679) is the perfect solution for both demanding professionals and passionate DIYers. This extremely practical set of two knives in different sizes ensures that you always have the right tool at hand for every type of cutting task.
Thanks to its robust construction, ergonomic design and integrated blade safety lock, this set delivers the ultimate combination of safety, precision and long service life. Forget about dull knives and inefficient work - with this set you will be up to any challenge. For the extremely affordable price of 8.99 EUR you will receive professional equipment that will raise the quality of your work to the next level.
Why choose this set of universal upholstery knives?
Every job requires a different level of precision. The smaller 9mm blade is ideal for fine, detailed work where surgical precision is key. The larger 18mm blade offers the exceptional strength and stability needed for cutting through harder and thicker materials. Together, they form an unbeatable pair that should not be missing in any workshop, office or household.
In addition to two top-quality knives, the set also includes additional replacement blades, meaning you are ready to work for a long time without interruptions and the additional cost of buying new blades. This is an investment that pays for itself on your first demanding project.
Key features and technical specifications

Extremely strong and durable construction: The knives are designed for long-term use and to withstand heavy work loads, which prevents the housing from bending.
Safety blade lock: The integrated locking mechanism prevents unwanted movement or slipping of the blade while working, ensuring maximum safety and stability when applying pressure.
Set of two different sizes: Includes a larger knife for more demanding tasks and a smaller knife for extremely precise cuts.
Large knife dimensions: Overall length 155 mm, blade width 18 mm – perfect for strong cuts and thicker materials.
Small knife dimensions: Overall length 130 mm, blade width 9 mm - ideal for precise modeling, cutting curves and details.
Rich package contents: Each knife comes with 3 extra blades (a total of 6 replacement blades in the set for long-term trouble-free use).
Versatile use: An indispensable tool for cutting paper, cardboard, fabric, leather, plastic, wallpaper, foil and many other materials.

Advantages of use in practice
Precision and safety are paramount when working with sharp blades. With an ergonomically designed handle that fits perfectly in the palm of your hand, this Olfa knife set reduces hand fatigue even during long work sessions. The safety lock ensures that the blade stays exactly where you need it, drastically reducing the risk of injuries and slips that could ruin your workpiece.
Thanks to the quick blade change option and the included replacement blades, you will always work with optimum sharpness. When the blade tip wears out, simply and safely break it off using the integrated attachment at the end of the knife or replace it with a new blade from the kit, and your tool will be as good as new again.
Versatility that convinces
This set of upholstery knives is suitable for a wide range of tasks encountered both at home and in a professional environment:

Wallpaper and flooring installation: Precise trimming of edges of wallpaper, linoleum, carpet or vinyl tiles without tearing the material.
Crafting and Modeling: Precise cutting of templates, cardboard, foam rubber, felt and textiles for creative projects.
Packing and opening packages: Quickly and easily cut adhesive tape, thick cardboard boxes, bubble wrap and protective film.
Construction and renovation work: Cutting insulation materials, plasterboard, sealing tape and thinner plastic pipes.

Product specifications:

Category: Blades and knives
Product code (SKU): 2679
Price: 8.99 EUR
Kit contents: 1x 18mm olfa knife, 1x 9mm olfa knife, 3x replacement blades for 18mm knife, 3x replacement blades for 9mm knife

Frequently Asked Questions (FAQ)
1. Are replacement blades included in the package?
Yes, the set includes three extra replacement blades for each knife (a total of 6 extra blades), ensuring a long life for the set without the need to immediately buy new blades. The blades are safely stored in convenient boxes.
2. How secure is the blade locking mechanism?
The knives are equipped with an extremely reliable and simple manual blade locking system that firmly fixes the blade in the desired position. This prevents the blade from moving forward or backward during cutting, ensuring safe, stable and precise work even under greater pressure.
3. What materials is this set best suited for?
This universal set is ideal for cutting a wide range of materials, including paper, cardboard, wallpaper, fabric, leather, plastic, foil, packaging materials and other similar materials encountered in everyday work, renovations or hobbies.


Responsible persons:
BLOW ELECTRONICS - Prolech Spółka z ograniczoną odpowiedzialnością, Stary Puznów 58B, 08-400 Garwolin, Poland, sklep@prolech.com.pl (+48) 25 684 8888
Distributor for Slovenia: Haloorodje.si, Online Sales, Rok Groznik sp, Podturn 42, 8350 Dolenjske Toplice, info@haloorodje.si, +38669731944, Slovenia
Product origin: China

Instructions for using the product:
• Choose the appropriate knife based on the material and type of cut.
• Adjust the blade to the desired length and secure it properly.
• Place the material on a stable and flat surface.
• Guide the knife along the marked line with even pressure.
• After use, retract the blade into a safe position.

Useful tips for work:
• For precise cuts, use a sharp and undamaged blade.
• Use a suitable cutting surface when cutting.
• Replace the blade regularly when it becomes dull.
• Store the knife in a safe place after use.

Warnings:
⚠️ The blade is very sharp - risk of cuts.
⚠️ Use protective gloves when changing the blade.
⚠️ Always keep your fingers away from the cutting path.
⚠️ Do not use a damaged or deformed knife.
⚠️ Always point the knife away from your body.
⚠️ Keep knives and spare blades out of the reach of children.

Same summary

The 18 and 9mm Olfa knife set is best suited for jobs where a combination of versatility and precision cutting is important. The use of multiple blade sizes means that you will be able to perform both light household tasks and more demanding tasks where you need a thinner or thicker blade. This set is more practical for users looking for a multi-purpose solution, and a little less sensible for those who need a highly specialized knife for very specific materials or professional industrial work. Users who frequently cut different materials will appreciate the quick blade change and the ability to adjust depending on the task.

Recommendation source: Enaa guides and team experiences.

User view

The 18 and 9 mm olfa knife set is most often used by home craftsmen, DIY enthusiasts, and professionals who need flexibility when working with a variety of materials – from paper, wallpaper, and packaging to thinner plastics or even simpler construction tasks. The combination of two standard sizes allows for easy switching between precise and coarse cuts, which is often more efficient than a single utility knife.

Users often choose Blow brand products because they provide proven quality and reliability for everyday use in the home and craft workshop.

Why buy at Enaa

At Enaa, you can easily find a wide range of blades and knives from renowned manufacturers, making it easy to compare different sets for home or craft use. Professionally prepared descriptions and a filter by purpose of use further help you choose the right tools for your needs.

Answers to frequently asked questions

What materials is this set of olfa knives most useful for?

The set is best suited for cutting paper, cardboard, thinner plastic films, wallpaper, rubber and lighter materials, but for more robust or thicker materials it is recommended to choose a specialized knife with a sufficiently strong blade.

How often should the blade in an olfa knife be changed?

The frequency of blade replacement depends on the frequency of use and the material being cut. When you notice that the blade is no longer sharp enough, simply replace it with a new segment or a replacement blade from the set.

Are the blades in this set replaceable?

Yes, the blades in both sizes are interchangeable, allowing for quick setup without major interruptions. The standard olfa blade design is extended and easy to supply additional pieces.

Is this set also suitable for precision model making?

The shorter 9mm blade allows for better control when making detailed cuts, making the set suitable for basic modeling tasks. However, for particularly demanding and precise work, it is worth checking out dedicated modeling knives.

What does universality mean in olfa knives?

Universal olfa knives are designed to cover a wide range of tasks - from everyday household chores to occasional service repairs, but they can also come in handy for smaller craft projects.

Description updated: April 2026