Why every sailor should have this knife in their pocket, toolbox, or life vest

13 januari 2026

Small tools often make the biggest difference on the water. The Ceramic Mini Foldable Knife from the Dutch brand Rubytec is one of those items you quickly stop thinking about, simply because it is always there when you need it.

At LiveWatersports we use this knife daily. For trimming control lines, cutting new Dyneema®, cleaning up splices, or as a safety backup when things get messy on board. It is light, sharp, and reliable, exactly what you want from a knife you carry close at hand.

A knife that belongs on every boat

This is not a bulky deck knife that lives in a locker. The Rubytec Ceramic Mini Foldable Knife is compact enough to fit in a jacket pocket, sailing shorts, or a buoyancy aid. At just 21 grams, you barely notice it, until the moment you need to cut a line quickly.

The included lanyard makes it easy to secure to your life vest or hang in a reachable spot.

Ceramic blade, real advantages on the water

The blade is made from zirconium oxide ceramic, a material second only to diamond in hardness. In practice this means a few important things for sailors.

The blade stays sharp far longer than steel. It does not rust. It is unaffected by salt, oil, or acids. It stays hygienic and clean, even in harsh marine conditions.

Most importantly, it cuts Dyneema® cleanly and effortlessly. One clean slice, no sawing, no frayed ends. If you have ever struggled with a dull knife while rigging or in a tight situation, you immediately feel the difference.

Safety first, without compromise

We always look at gear through a safety lens. If you need to cut a line, it is often because you are in a position you do not want to be in. Under load, under pressure, sometimes underwater or half tangled.

This knife opens quickly, cuts instantly, and folds away securely. The folding tension can be adjusted using the stainless steel screws, so you can set it exactly how you like it. Firm enough to feel safe, smooth enough for fast access.

Keeping one in your buoyancy aid is a small decision that can make a big difference.

Also a great gift

Because it is compact, practical, and affordable, this knife makes an excellent gift. Ideal for junior sailors, club sailors, or as a small but thoughtful present for anyone who spends time on the water.

It is one of those items every sailor should have, yet many do not think of buying themselves.

⚡️New⚡️ at LiveWatersports, only €8.50

This is a new product in the LiveWatersports store, available for only €8.50. We stock it in two colours: Navy Blue and Red, so you can choose what fits your kit best.

You can find the product here:
https://livewatersports.eu/products/ceramic-mini-foldable-knife-rubytec