
Excel Blades K18
Score: 75/100
OLFA 145B
Score: 85/100Rankings

The OLFA 145B is a medium-duty utility knife designed for precision cutting of delicate materials like wallpaper and vinyl. Its key strength lies in the ultra-thin special black blade that ensures clean cuts without surface damage. It is best suited for professional wallpaper installers and detail-oriented trades needing thin, clean cuts.

The Excel Blades K18 is a precision craft knife manufactured in the USA, featuring a lightweight aluminum body with a cushioned soft grip handle for enhanced comfort and control. It includes a #11 double honed blade and a shatter-resistant safety cap, designed for detailed cutting tasks across various materials. It is ideal for graphic artists and hobbyists requiring precision cutting for paper, card-stock, and foam.
| Attribute | ![]() | ![]() |
|---|---|---|
6.35 mm | 9 mmbest | |
| ↓ lower better | 36.3 gbest | — |
230.1 mmbest | 146 mm | |
0best | 0best |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | ![]() | ![]() |
|---|---|---|
Blade & Cutting(6) | ||
Blade Type | #11 | Special M-shaped |
Blade Material | Carbon Steel | Black Coated Steel |
Blade Width (mm) | 6.35 mm | 9 mm |
Blade Segments | N/A | |
Blade Angle (degrees) | N/A degrees | degrees |
Compatible Blade Type | Standard #11/Xacto | Olfa Medium Special Black |
Handle & Ergonomics(4) | ||
Handle Material | Aluminum | Composite/Plastic |
Handle Type | Hexagonal | Medium |
Overall Length (mm) | 230.1 mm | 146 mm |
Weight (g) | 36.3 g | g |
Safety & Mechanism(3) | ||
Retractable | false | true |
Locking Mechanism | Chuck Lock | Auto-Lock |
Blade Change Mechanism | Rear Release | Manual Fold |
Application & Support(4) | ||
Suitable Materials | Paper, Foam, Plastic, Wood, Clay | Wallpaper, Vinyl, Film, Foam |
Intended Use | Hobby/Craft | Precision Cutting |
Warranty | 30 days | Long Life Award |
Included Blades | 1 | None |


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The search results do not include professional reviews from major publications or expert editor commentary, so there is no professional consensus to summarize.
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Professional reviewers categorize the OLFA 145B as a 'Medium-Duty' tool that offers durability, strength, and precision in a compact size, highlighting it as a 'must-have' for professionals.
Users praise the tool for its ability to make clean cuts on wallpaper without causing surface damage, though some note the need to purchase refill blades separately.

