Sakura Crépas Rattle Review: A Rare Double-Knock Mechanical Pencil from Japan

Introduction

Double-knock mechanical pencils occupy a small but devoted corner of the stationery world. The mechanism protects the lead sleeve by retracting it before you pocket the pencil, and a proper double knock is usually the signature of a drafting pencil at a drafting pencil price. So when Sakura Crépas released the Rattle, a new double-knock model from a major Japanese manufacturer at a budget price, plenty of enthusiasts had reason to get excited.

I picked one up on Amazon for ¥448, against a list price of ¥550 including tax. Was it worth it? Mostly, yes, with one design decision worth thinking about before you buy.

What the Rattle Is

The Rattle arrives in a vinyl package, which felt refreshingly old-school for a new release. The front prominently announces the double-knock mechanism, and it delivers exactly what that label promises: a strong knock extends the pen-tip body out of the barrel, a light knock feeds lead, and another knock retracts the sleeve for carrying.

It is available in 0.3mm and 0.5mm lead sizes, with color options split by size: white, dark gray, and dark green for 0.3mm, and black, dark red, and dark blue for 0.5mm. The version reviewed here is the 0.5mm black.

One thing to know up front: the Rattle is essentially the same pencil as Alvin’s Draft-Tech Liltra, which is already sold internationally, and the tooling itself is Japanese-made. The Rattle is an OEM arrangement rather than an original Sakura Crépas development, similar to how Sakura Crépas has handled overseas models before. If you have seen the Liltra, you have seen the Rattle. The good news is that the price difference makes it genuinely cheaper to get this design locally.

Design and Specs

The barrel is ABS resin with a silver ring around the tip area printed with the maker name, model, and lead size. The grip is not rubber but elastomer, with a woven-groove texture that gives it a lightly raised, fabric-like look. It is genuinely slip-resistant and gives you a confident hold. The clip is a stainless plate with ordinary stiffness, gripping a pocket or notebook firmly.

The knock button is very simple and unusually long, similar to a multipen’s low-cap knock. There is an eraser under the knock, but no cleaning rod for clearing lead jams. One subtle detail: the chuck at the tip is a translucent resin rather than metal, and there is a slight wobble in the lead sleeve, though not enough to affect normal writing.

Measured with the tip extended, the Rattle is 141mm long, weighs 10.2g, and the grip section is 9.5mm in diameter. The balance point sits near the center.

How It Writes

On paper, the Rattle is soft and gentle. There is no scratchy hardness here; the lead glides with a cushioned, forgiving touch. If drafting pencils feel too rigid to you, this is closer to the opposite end of the spectrum, and it is a genuinely pleasant character for everyday notes.

Combined with the centered balance and the secure elastomer grip, the overall writing experience is calm and stable. For long sessions, it is easy to forget you are holding a pencil that cost under ¥500.

Things to Consider Before Buying

The main trade-off is the grip position. The grip sits close to the tip and covers a narrow range. That is comfortable if you hold the pencil near the tip, but if you grip slightly higher, the section simply runs out beneath your fingers. A longer grip would have suited a wider group of hands. If you are used to holding the barrel lower down, expect an adjustment period where the balance may feel slightly off.

That said, this is a matter of preference rather than a flaw in quality. Everything else, from the clip to the double-knock action, behaves as you would hope.

Should You Buy It?

If you want a double-knock pencil and prefer not to pay drafting-pencil prices, the Rattle is an easy recommendation. The writing feel is soft and comfortable, the balance is good, the mechanism protects the tip as advertised, and the grip holds steady. The fact that a Japanese manufacturer put this design on domestic shelves at this price has real value, even if the same pencil exists under another brand overseas.

It is worth being honest about the OEM situation: if you already own the Draft-Tech Liltra, you gain nothing by buying this except the color choices and a lower price. But if this would be your first double-knock pencil, the Rattle is one of the least expensive ways to experience the mechanism.

Conclusion

The Sakura Crépas Rattle is a comfortable, well-priced double-knock mechanical pencil with a soft writing feel and a slip-resistant grip. Its short grip section will divide opinion, and it is an OEM design rather than a true original. For anyone curious about double-knock pencils, it remains an appealing and affordable place to start.