

Uni M5-228 Mechanical Pencil
In modern work environments across offices, factories, and production facilities, equipping appropriate writing instruments helps optimize daily staff productivity. The Uni M5-228 mechanical pencil from Uni Mitsubishi Pencil (Japan) features a unique side-push button alongside a large eraser, delivering superior convenience during daily workflow execution.
Overview of Uni M5-228 Mechanical Pencil
The Uni M5-228 (Shalaku S) is a technical and office push-type mechanical pencil designed for user experience optimization. The key highlight of this product lies in the push button integrated directly on the side of the barrel (side-knock mechanism), enabling users to advance the lead effortlessly without altering their gripping posture.
Utilizing a standard 0.5 mm lead line, this pencil fulfills quick note-taking, draft editing, preliminary technical sketching, and inventory tracking needs in factory zones.
Design Advantages of Uni M5-228
Convenient Side-Push Mechanism
- Quick operation: The side-knock button is positioned right under the thumb during use, making lead advancement simple without breaking thought flow or writing speed.
- Work efficiency enhancement: Supports continuous user operation during data entry, document review, and draft signing.
Integrated Large Eraser
- Convenient erasing: The top eraser is significantly larger than those on conventional mechanical pencils, allowing quick corrections without searching for a separate eraser.
- Hygienic protective cap: Keeps the eraser clean and ready for immediate use.
Ergonomic Barrel Design and Rubber Grip
- Soft rubber grip: The rubber-cushioned grip section reduces pressure on fingers, providing comfort during extended writing sessions.
- Diverse color options: Available in 5 color variations including Blue, Black, Red, Green, and Light Blue, facilitating stationery organization by department or division.
Technical Specifications of Uni M5-228
Below is the detailed specification table for corporate supply procurement:
| Product Name | Manufacturer Code | Lead Size | Color | Unit | Order Code |
|---|---|---|---|---|---|
| Uni M5-228 Mechanical Pencil | M5-228 | 0.5 mm line | Blue | Pc | 037910 |
| Uni M5-228 Mechanical Pencil | M5-228 | 0.5 mm line | Black | Pc | 037911 |
| Uni M5-228 Mechanical Pencil | M5-228 | 0.5 mm line | Red | Pc | 037912 |
| Uni M5-228 Mechanical Pencil | M5-228 | 0.5 mm line | Green | Pc | 037913 |
| Uni M5-228 Mechanical Pencil | M5-228 | 0.5 mm line | Light Blue | Pc | 037914 |
Note: Brand: Uni Mitsubishi Pencil (Japan). Key features: Side-knock mechanism, jumbo eraser.
Applications in Business Operations
- Office & Accounting Block: Used for notebook entries, draft approvals, and numerical calculations.
- Design & Engineering Departments: Ideal for sketching ideas, drawing diagrams, and marking technical drawings.
- Warehouse & Workshop Management: Serving inventory checks, operational parameter logging, and production progress tracking.
Frequently Asked Questions (FAQ)
1. What size refill lead does the Uni M5-228 mechanical pencil use?
The pencil uses standard 0.5 mm mechanical pencil leads. Pairing it with high-quality 0.5 mm Uni lead refills is recommended for smooth writing and lead durability.
2. What advantages does the side-push button offer over end-push buttons?
The side-knock design allows lead advancement with a single thumb press while writing, eliminating the need to shift hand posture or flip the pencil, saving time and maintaining focus.
3. Does Nhanh Nhanh support VAT invoicing and direct site delivery?
Yes. Nhanh Nhanh provides comprehensive B2B stationery supply services for enterprises, factories, and corporate offices with full VAT invoice compliance and direct site delivery.




















