Have you ever found that a ballpoint pen's ink refill writes beautifully, but the pen body feels uncomfortable to hold, or lacks the refined feel needed for formal occasions? The Smart Refill Pen Jacket may be the answer.

The Refill Pen Jacket is a simple yet powerful universal pen body, compatible with over 1,000 different commercially available ballpoint pen refills. Its premium, comfortable stainless steel and aluminum alloy weighted design delivers an outstanding writing experience and convenience.

A Japanese designer brand — a premium, ergonomic pen body compatible with 1,000+ commercially available refills, upgrading your favorite ballpoint pen!

Inside the Smart Refill Pen Jacket's inner shaft is a fixing clip that firmly grips the tip of the refill. This design is intended to secure the tip and reduce wobble, working with 1,000+ types of ballpoint pen refills while improving smoothness and stability while writing. Swapping refills is as simple as unscrewing the inner shaft clip from the pen body.

The pen barrel features a cap-shaped cylindrical design that tapers from thick to thin, improving comfort when held. The grip (neck section) and inner fixing clip are made of stainless steel (SUS304), while the pen body and cap are made of aluminum alloy (A6063), with a total weight of 28.4 grams.

Balanced Pen Weight for a More Comfortable Writing Feel

The discomfort commonly felt when writing with ballpoint pens isn't caused by overall weight, but by the weight balance felt while holding the pen. Writing comfort comes from a weight distribution where the pen tip is slightly heavier than the barrel.

Consummate Craftsmanship — Meticulous Materials, Premium Feel

Deff is a Japanese manufacturer with long-standing expertise in the planning, manufacturing, and sales of metal-worked products. We strive to ensure every finished product is perfectly executed. With true craftsmanship, our designs are not created for aesthetics alone but for practicality as well. The materials are meticulously chosen: the pen barrel itself is made of anodized A6063 aluminum alloy, offering both corrosion resistance and a polished surface finish; the grip is made of SUS304 stainless steel with a polished PVD finish, giving the pen body a perfectly balanced weight distribution front to back along with an overall refined look.

Aluminum Alloy & Stainless Steel Version

TITANIUM Alloy & Stainless Steel Version (Titanium Gray)

Titanium alloy machining is extremely difficult, requiring manufacturing methods entirely different from steel and aluminum. We've introduced a flagship version with all aluminum alloy parts replaced by titanium alloy. This titanium alloy is known as 6-4 titanium, a special alloy with even greater strength than pure titanium. It's a highly reliable material, used even in artificial joint implants as well as in the nuclear power and aerospace industries.

Meeting Diverse Needs

A ballpoint pen can meet a wide range of personal and formal-occasion needs. Many people would love to carry a premium-feeling pen during business negotiations or in front of clients, but the price and cost of replacing refills has always kept them from taking that first step.

Many who care about their writing instruments especially love Japanese ballpoint pens, because even at a low price point, they still feel comfortable to hold. Pens fitted with the Smart Refill Pen Jacket not only gain a more premium appearance, but also become even more comfortable to hold and write with.

Usage Scenarios

Available Colors and Material Combinations

Eco-Friendly Packaging

The gift packaging box is made from eco-friendly materials — recycled paper and fiber that are biodegradable or recyclable.
Single-color printing also reduces ink usage.

How to Use

Specifications

Materials / Weight

●Aluminum Alloy, Stainless Steel

(Deep Black, Electric Blue, Pagoda Green)

Cap: Aluminum alloy

Cap body: Aluminum alloy

Clip: Aluminum alloy

Barrel: Aluminum alloy

Grip: Stainless steel

Collet: Stainless steel

Weight: 28.4g

● Titanium Alloy, Stainless Steel (Titanium Gray)

Cap: Titanium alloy

Cap body: Titanium alloy

Clip: Titanium alloy

Barrel: Titanium alloy

Grip: Stainless steel

Collet: Stainless steel

Weight: 37g

Usage Precautions and Limitations

・This product does not include a refill.

・Before use, check for any looseness. If loose, the refill may shift.

・Do not clip this product into the pocket of a thick jacket, as the clip may become deformed.

・Store away from water, dust, direct sunlight, high heat and humidity, and out of reach of children.

Product Warranty Terms

• The product warranty period is 6 months from the date of purchase.
• New product defects are covered for 30 days from the date of purchase or the date the item arrives. In the event of a product defect or missing parts, we will send the missing parts or a replacement product.
• Refills (replacement cores) used with the product are not covered under warranty.