BIIB 9-in-1 Multitool Pen
- Item Weight: 0.13 pounds
- Color: Yellow
- Size: Small
- Battery Cell Type: Alkaline
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A small, sturdy aluminum utility knife for everyday box and package cutting, not a replacement for a full-size job-site blade.
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ASIN: B0813NDWSDModel: BI-91Category: Utility & Work Knives
Overview
The BIIB BI-91-Yellow is a small aluminum-body knife weighing 2.08 ounces, sized for quick cutting tasks rather than heavy-duty work. Its yellow finish and small size point to a utility cutter meant for easy visibility and one-handed use.
Built with an aluminum body instead of plastic, it favors a firmer grip over the lightest possible weight. The small size classification fits pocket or drawer storage over a full-size shop knife.
- Aluminum construction
- Weighs 2.08 ounces
- Small size classification
- Yellow finish for visibility
Who it's for
Works for anyone wanting a compact, sturdy cutter for boxes, tape and packaging around the home or office. Not intended as a heavy construction or trade knife.
Pros and cons
- Aluminum body adds durability over plastic
- Small, light size for easy carry
- Small size limits it to lighter cutting jobs
Performance notes
At 2.08 ounces with an aluminum body, the knife balances durability against the lighter weight of plastic-bodied cutters. Its small size classification keeps it easy to handle and store but limits it to lighter cutting tasks.
Specifications
| Brand | BIIB |
|---|---|
| Model | BI-91 |
| Dimensions & fit | |
| Item Weight | 0.13 poundslower than 69% of 145 utility & work knives |
| Size | Small |
| Product Dimensions | 1 × 1.6 × 1.4 inches |
| Power & efficiency | |
| Battery Cell Type | Alkaline |
| Construction & materials | |
| Color | Yellow |
| Material | Aluminum |
| Included components | |
| Number Of Pieces | 1 |
| Batteries Included | Yes |
| Included Components | Pen |
| Item Package Quantity | 1 |
| Other details | |
| Batteries Required | No |
| Part Number | BI-91-Yellow |
| Special Features | Refillable |
| Item Model Number | BI-91-Yellow |
| Batteries | 6 Lithium Metal batteries required. (included) |
| Tool Tip Description | ball tip |
Closest rivals on specs
Frequently asked questions
What is the BIIB BI-91-Yellow made of?
It has an aluminum body.
How much does the BIIB BI-91-Yellow weigh?
It weighs 2.08 ounces.
What size is the BIIB BI-91-Yellow?
It is listed as a small size cutter.