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DeFF's third generation Refill Pen Jacket from Japan that can be used with over 700 refills! This time, we have added the flagship brass model and penholder.
Engraving fonts available
1. Montserrat (Click to view more)
2. Great Vibes (Click to view more)
3. Racing Sans One (Click to view more)
4. Big Shoulders Stencil Text (Click to view more)
Pairs well with

DeFF 3rd Gen Refill Pen Jacket (Magnalock Design Collection)
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
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DEFF 3rd Generation Refill Pen Jacket (Magnalock Edition)
The basic concepts of third edition remain unchanged, but the design, machinery, materials, dimensions and many other aspects have been improved on the basis of the previous editions.
The third generation "Upgrade Favorite Ballpoint Pen" solves all customers' troubles about pens.
- Although this pen is easy to write, the shape of the pen body is very subtle.
- I want a high-end pen, but it's not easy to buy a refill.
- Although I want to buy a new pen, I don't want to change the writing effect of the current pen.
- There are a lot of useless refills bought.
(Support comments from the 1st and 2nd generations)



A variety of refills can be used directly
Refill Pen Jacket can use more than 700 refills on the market and support many overseas products, which can be installed without modification.
The refill is installed on the fixing clip, and then the fixing clip is put into the pen tube. There is no need for adjustable gaskets, fixed springs, and no need to modify the refill.

Stable writing sense
- Supported by the central part of the pen, the balance of the slightly heavier tip of the pen is the key point of easy writing.
- Aiming at the weight of the pen, which is neither too light nor too heavy, the wonderful part of the texture is just right.
* Please note: When wearing the pen cap at the back, the balance will be biased to the center or from the back.

You can write according to what you think where you think
This product is a fixed snap, which fastens the refill tightly, making writing easier by preventing shaking.

Balance portability and ease of writing
The pen case alone is about 145mm, which is a general length, but it has also received many "too long" comments.
Therefore, we investigated again to find a length that balances portability and ease of writing, and this time shortened the full length to about 117.5mm.
Please experience the advantages of this length that you can only know when you pick it up.

Knurled grip
We’ve made it shorter than the previous model, with an overall length of approximately 117.5 mm. The grip features a knurled (anti-slip) finish for better control. Try holding it in your hand and experience the comfort of this perfectly balanced length for yourself.

Magnetic Pen Cap
The pen cap is fixed by a magnet. Every time you remove and put on the pen cap, you will feel a pleasant metal "click" sound.

Cut out from the metal blocks one by one
Each part of the pen case is precisely cut under computer control, carefully cut out one by one, and after several hours of repeated processing,Then combine each part and finally make it into a pen. Only after strict inspection will qualified products be shipped as commodities.
Flagship【 Brass 】
The special highlight style of the third generation is brass. Brass is often used in high-end writing tools and vintage items. It is said that it is used because of its beautiful appearance, good processability and high durability.
On the other hand, brass is easy to scratch because it is very soft, and there are also negative factors of surface changes and weight caused by oxidation, so most of them have been replaced with aluminum or plastic, but they are still deeply rooted in popular materials.
There is no surface treatment for brass. Through the use of users, the surface will change little by little and the taste will also increase. Sometimes it may fall down and get scratched. However, even so, it will be engraved on the pen as history.

【 Precautions for Brass 】
The part in contact with the hand is particularly oxidized. The degree of oxidation progress and the finished product will also be affected by the user's constitution.
【 Maintenance of brass 】
Using the metal polishing cloth on the market can restore the early luster and color. Abrasives, etc. can also restore their beauty. However, if the abrasive enters the inside of the pen, it will cause trouble, so it is not recommended.


The third generation【Special Penholder】
A special pen holder has been specially prepared this time. The pen holder is based on the concept of "integrating into daily design". As an interior decoration, it can also have a beautiful posture in living spaces, shops and other places, and at the same time, it also has the convenience of using pens.
The pen itself can stand vertically. The oval base has enough weight and is not easy to fall down. Like the pen cap, it has the click of a magnet. The mirror treatment is available in two colors, black and gold.
* Please match them according to your preferences and colors.







Eco-friendly Packaging
Gift boxes are made of environmentally friendly materials, recycled paper and fiber, which can be biodegraded or recycled. Monochrome printing can also reduce the use of ink.


【Specification】
Aluminum & Stainless Steel
1. Connection parts: stainless steel
2. Main body: aluminum
3. Rear end cover: aluminum
4. Tip cover: stainless steel
5. Clump: stainless steel
6. Magnet ring: magnet
7. Pen cap parts: stainless steel
8. Pen cap: aluminum
9. Clip: stainless steel
Brass & Stainless Steel
1. Connection parts: stainless steel
2. Body: brass
3. Rear end cover: brass
4. Tip cover: stainless steel
5. Clump: stainless steel
6. Magnet ring: magnet
7. Pen cap parts: stainless steel
8. Pen cap: brass
9. Clips: stainless steel

【 DETAILS 】
1. Pen Jacket
Full length including pen cover: 128mm
Total length of penless cover: 117mm
Total length with pen cap: 144mm
Diameter 12mm
Aluminum & stainless steel 24.7g (19.1g without cover)
Brass & stainless steel 51.8g (32.3g without cover)
2. Special pen holder (10)
Size: W52.5 x D38.3 x H 35 mm
Weight: 298.5g
3. Applicable refill conditions
Full length: less than 112mm
Diameter: 6.3 mm or less
Pen tip diameter: 2.2~2.6mm
【 Precautions and restrictions on use 】
- This product does not come with refills.
- Regarding the refill (replacement core) corresponding to this product, the size is limited to the standard recorded in the manual.
- By adding a refill (replacement core) to this product, the tip of the refill may be scratched.
- This is due to the fixed structure of this product. There is no effect on destroying the refill (replacement core) and the feeling of writing.
- Before using this product, please check whether it is loose. When loose, the refill (replacement core) may move.
- When this product is fixed in the pocket of a thick jacket and other places, the clip part may be deformed.
- Keep away from water, dust, and direct sunlight, hot and humid places, and in places within the reach of infants and children.
【 Product Warranty 】
- The warranty period of the product is within 6 months from the date of purchase or the date of arrival of the product.
- The warranty period for new products is within seven days from the date of purchase or the date of arrival of the goods.
- In case the product fails, the parts are insufficient, etc., the parts and products will be replaced as the initial defective parts and insufficiently transmitted.
- The refill (replacement core) used is not covered by the warranty.
【 Designer of this product 】

Hayato Yamagishi
Representative of HYT-DESIGN Co., Ltd.
Part-time lecturer in the Department of Production and Design, Tama University of Fine Arts
Born in 1979, he spent his childhood in the Netherlands and the United States. After graduating from Tama University of Fine Arts with a major in product design in 2004.
Established HYT-DESIGN in 2011 and became the design director of Deff in 2017.
As a product design of Deff, the "Wireless Charging Tray" won the iF DESIGN AWARD 2021.
2014: Part-time lecturer at Tama University of Fine Arts
2015: Won the Tokyo Business Design Award and participated in Milan Design Week
2016: Won the Hizen Yoshidayaki Design Competition
2017: Design Director of Deff, won the D&AD Wood Pencil Award, won the Adfest INNOVA Department Award, and won the Spikes Asia Innovation Department Award
2018: 2 products won the iF Design Award
2021: iF Design Award
2023: iF Design Award Winner
2026: iF Design Award Winner









