COSCO 91508 Knife
- Knife
- Plastic
- 2.1 ounces
- 6.3 inches
- More reviewed than 59%
A lightweight, all-plastic option for basic cutting tasks, not built for heavy or repeated hard use.
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How it ranks among the 246 knifes we track
4.4★ across 2,643 Amazon ratings, Bayesian-smoothed toward the category average.
2,643 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
200+ bought on Amazon last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 246 knifes we track - how the scorecard works · full knifes data report. Confidence: high - strong rating volume and complete data.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
The COSCO 91508 is a plastic-bodied knife measuring 6.3 inches long and weighing 2.08 ounces. It carries a 4.4 star rating from 2,643 reviews, with around 200 purchases in the past month.
Both the blade housing and handle are listed as plastic, pointing to a light-duty utility or craft knife rather than a metal-bodied fixed blade meant for heavy cutting. At 6.3 inches overall it sits in typical box-cutter or hobby-knife territory.
- 6.3 inches long
- 2.08 ounces
- Plastic body and handle
- 4.4 stars from 2,643 ratings
Who it's for
Works for light household or craft cutting tasks such as opening boxes or trimming paper and cardboard. Anyone needing a metal-handled or heavy-duty utility knife for repeated tough cutting should look elsewhere given the all-plastic build.
Strengths and trade-offs
Drawn from this product's published specifications.
- Light at 2.08 ounces, easy to hold
- 6.3 inch length suits general cutting tasks
- Solid 4.4 star rating from a large review base
- All-plastic build limits it to light-duty cutting
- Not suited to repeated heavy use
Performance notes
The plastic material and handle keep total weight to just over 2 ounces, making it easy to hold for short tasks, though it will flex more than a metal-bodied knife under hard pressure.
Specifications
| Brand | COSCO |
|---|---|
| Model | 91508 |
| Material | Plastic |
| Item Weight | 2.1 ounces |
| Length | 6.3 inches |
| Handle | Plastic |
How it compares
This product against the closest alternatives we track in knifes.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| COSCO 91508 KnifeThis product | 4.4 / 5 | 2,643 | 4.2 / 5 |
| WORKPRO W013053AU KnifeWORKPRO | 4.8 / 5 | 9,700 | 4.7 / 5 |
| Victorinox 0.6223.G KnifeVictorinox | 4.8 / 5 | 9,400 | 4.7 / 5 |
| LEATHERMAN 831426 KnifeLEATHERMAN | 4.8 / 5 | 9,800 | 4.6 / 5 |
| Gerber 31-000345 KnifeGerber | 4.7 / 5 | 16,300 | 4.6 / 5 |
Similar knifes from other brands
Questions about the COSCO 91508
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
What is the COSCO 91508 made of?
Plastic, both the body and the handle.
How long is it?
6.3 inches.
How much does it weigh?
2.08 ounces.