---
product_id: 10764442
title: "uni Ball Signo Knock Ballpoint Pen RT1 0.38mm Color, Black (UMN15538.24)"
brand: "三菱鉛筆"
price: "1464 kr"
currency: ISK
in_stock: true
reviews_count: 13
category: "三菱鉛筆"
url: https://www.desertcart.is/products/10764442-uni-ball-signo-knock-ballpoint-pen-rt1-0-38mm-color
store_origin: IS
region: Iceland
---

# Smooth, fast ink flow Sleek black ink for professional clarity 0.38mm extra-fine precision uni Ball Signo Knock Ballpoint Pen RT1 0.38mm Color, Black (UMN15538.24)

**Brand:** 三菱鉛筆
**Price:** 1464 kr
**Availability:** ✅ In Stock

## Summary

> 🖊️ Write sharp, write smart — your signature tool for success!

## Quick Answers

- **What is this?** uni Ball Signo Knock Ballpoint Pen RT1 0.38mm Color, Black (UMN15538.24) by 三菱鉛筆
- **How much does it cost?** 1464 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/10764442-uni-ball-signo-knock-ballpoint-pen-rt1-0-38mm-color)

## Best For

- 三菱鉛筆 enthusiasts

## Why This Product

- Trusted 三菱鉛筆 brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Ergonomic Elegance:** Rubber grip designed for all-day comfort and control
- • **Snap & Go Convenience:** Reliable snap closure for quick access and secure storage
- • **Effortless Writing Flow:** Experience silky smooth ink that keeps pace with your ideas
- • **Timeless Professional Style:** Sleek black ink and minimalist design that commands attention
- • **Precision that Speaks Volumes:** Ultra-fine 0.38mm tip for crisp, clean lines every time

## Overview

The Uni-Ball Signo Knock Ballpoint Pen RT1 features an ultra-fine 0.38mm tip delivering precise, smooth black ink flow. Its ergonomic rubber grip and snap closure combine comfort with convenience, making it a top choice for professionals who demand style and performance in every stroke.

## Description

Uni Uni-Ball Signo Knock Ballpoint Pen RT1 0.38mm Color, Black

Review: New favorite pen ever - I used to write with the muji gel pen and decided to go for this une for its aesthetic and based on reviews, I am not disappointed. I usually never write reviews but this one is so worth the money. It writes fast the flow is amazing the 0.38 is perfect for my writing. Aesthetically it’s so elegant too the grip is perfect. Only drawback if I had to really be picky if that it smears a little if you don’t let it dry but it’s perfect for me as I’m right handed. Go for it!!
Review: Best Pen - Uniball Signo 0.38 is my favorite pen regardless of color. Smooth flow, not scratchy like some ultra fine point pens, and no smudging for left handed writers!

## Features

- Uni Knock Ballpoint Pen RT1
- Color Ink Knock Ballpoint Pen
- 0.38mm Point
- Product Dimensions 4.15 x 2.8 x 1.4 inches

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00B57W4QU |
| Best Sellers Rank | #78,583 in Office Products ( See Top 100 in Office Products ) #1,771 in Gel Ink Pens #2,083 in Ballpoint Pens |
| Brand | 三菱鉛筆 |
| Closure | Snap |
| Color | Black |
| Customer Reviews | 4.4 4.4 out of 5 stars (802) |
| Date First Available | March 5, 2013 |
| Grip Type | Rubber |
| Ink Color | Black |
| Is Discontinued By Manufacturer | No |
| Item Weight | 0.16 ounces |
| Item model number | UMN15538.24 |
| Line Size | 0.35 |
| Manufacturer | Uni |
| Manufacturer Part Number | UMN15538.24 |
| Material Type | Plastic |
| Number of Items | 1 |
| Point Type | Extra Fine |
| Size | 1 Count (Pack of 1) |

## Product Details

- **Age Range (Description):** Teen
- **Brand:** 三菱鉛筆
- **Color:** Black
- **Ink Color:** Black
- **Writing Instrument Form:** Roller Ball Pen

## Images

![uni Ball Signo Knock Ballpoint Pen RT1 0.38mm Color, Black (UMN15538.24) - Image 1](https://m.media-amazon.com/images/I/61kfQZBdxnL.jpg)

## Available Options

This product comes in different **Color, Size** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ New favorite pen ever
*by A***A on January 11, 2025*

I used to write with the muji gel pen and decided to go for this une for its aesthetic and based on reviews, I am not disappointed. I usually never write reviews but this one is so worth the money. It writes fast the flow is amazing the 0.38 is perfect for my writing. Aesthetically it’s so elegant too the grip is perfect. Only drawback if I had to really be picky if that it smears a little if you don’t let it dry but it’s perfect for me as I’m right handed. Go for it!!

### ⭐⭐⭐⭐⭐ Best Pen
*by L***H on April 22, 2025*

Uniball Signo 0.38 is my favorite pen regardless of color. Smooth flow, not scratchy like some ultra fine point pens, and no smudging for left handed writers!

### ⭐⭐⭐⭐⭐ Best pen I have owned
*by Y***R on April 12, 2025*

Writes ultra fine. I love how the ink writes so smooth.

## Frequently Bought Together

- Uni Ball Signo Knock Ballpoint Pen RT1 0.38mm Color, Black (UMN15538.24)
- Uni Signo RT1 Gel Ballpoint Pen Black Ink Refills, 0.38mm, Set of 4

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**Shop now:** [https://www.desertcart.is/products/10764442-uni-ball-signo-knock-ballpoint-pen-rt1-0-38mm-color](https://www.desertcart.is/products/10764442-uni-ball-signo-knock-ballpoint-pen-rt1-0-38mm-color)

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*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-02-18*