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  • Knife Sharpening Made Easy

    Flip & clamp precision. Razor edges in minutes with single-turn angle control and quick 4x1 stone swaps. 🔪
    pre-order now on kickstarter
    Hapstone S4 puts pro-level sharpening in the palm of your hand. It uses firm, precise knife clamping and a flip-over rotary module so you can sharpen both sides without reclamping. Smooth angle adjustment lets you set the bevel with a single turn. Swap 4x1 inch stones in seconds with an integrated linear bearing, and keep a stable feel on a heavy steel base with a rigid polymer housing and rubber feet. Built to evolve, it supports modules for scissors, convex edges, and more. Designed in Ukraine by a team making sharpeners since 2012, it is compact, accurate, and easy to use for kitchen, EDC, outdoor, and hunting knives. Back it on Kickstarter today.

    About

    Having achieved success and acclaim on the market of knife sharpeners, we do not stop working and developing. We now want to say that this is the finest knife sharpener on the market with this unique design, since we have invested ten years of our experience into designing the best sharpening system.

    FAQ

    What does it mean to back a project (pledge)?

    When you back a project, you are pre-ordering the product. That means you will get it once it's produced. Besides getting the product itself, you're also joining a community. Follow along the production process, take part in important surveys and give the creator valuable feedback.

    What is Kickstarter?

    Kickstarter is a launchpad for creators to raise funds for the initial production of their invention. Backers (that's you!) can support the creator by pre-ordering the product at a discounted price.

    How do I pledge?

    In order to pledge, click that green button that says Back this project . You will get to select your shipping country and choose your desired pledge level and reward.

    Reviews

    I like the design and ease of setting an angle. ; Looks nice. Needed tool. ; I follow a YouTube account called fandecouteaux, and Ive already talked about your products several ; I love your products and the s4 appears to suit my needs more than the R2 that I currently have. ; need for quality sharpener ; Looks line it would be easy to use. ; I am looking for a knife sharpening system that is compact ; I HAVE KNIVES TO SHARPEN AND YOUR PRODUCT LOOKS AMAZING ; Bought previous sharpeners ; I want a way to properly sharpen knives. Most other methods dont offer this. I have a ormek YT thats ; Been looking for an adequate sharpening system for knives. I have quite a few and want to keep them ;

    🎁 Support this project & unlock additional 30% off Darwin M2

    The Darwin M2 is a versatile tool for makers and learners—Kickstarter-funded and ready to ship.

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