Hapstone RS Ultra is the maximum configuration in the Hapstone RS family — a fully equipped sharpening system with two pairs of Small Universal Angled Clamps, case, digital angle gauge, Precise Angle Adjuster, and Advanced Stone Holder already included.
Hapstone RS Ultra — Package Update
Configuration changes effective June 1, 2026
Until June 1, 2026After June 1, 2026
Included
Until June 1, 2026
After June 1, 2026
Base Hapstone RS
✔
✔
Rotating Clamp Module
✔
✔
Clamps
Hapstone RS Clamps Small Universal Angled Clamps
Small Universal Angled Clamps (2 pairs)
Advanced Stone Holder with Linear Bearing
✔
✔
Stopper
✔
✔
Precise Angle Adjuster for Hapstone RS
✔
✔
Case for Hapstone RS
✔
✔
Digital Angle Gauge
✔
✔
Ball-End Hex Screwdriver (3 mm)
✔
✔
King Size Sharpie Marker
✔
✔
Stickers Hapstone
✔
✔
WHAT’S CHANGED
After June 1, 2026, the RS Ultra configuration replaces the previous RS clamp set with an additional pair of Small Universal Angled Clamps, giving the package two pairs of Small Universal Angled Clamps for improved versatility and support for different blade geometries.
Maximum configuration
Everything you need in one case.
Hapstone RS Ultra is the most complete configuration in the Hapstone RS lineup. It includes key upgrades, two pairs of Small Universal Angled Clamps, measuring tools, and a storage case from the start.
Ready now
No need to build the setup later.
This is a fully equipped system here and now — designed for users who want broad sharpening coverage and a premium out-of-the-box experience.
Clamp versatility
Two pairs of universal angled clamps.
RS Ultra includes two pairs of Small Universal Angled Clamps. This setup provides stable knife holding and broad compatibility with different blade shapes, from thin utility knives to everyday kitchen blades.
Precision
Fine angle control included.
The Precise Angle Adjuster for Hapstone RS helps make small angle changes faster, easier, and more repeatable during sharpening.
Storage
All essentials in one case.
The included case helps keep the system and accessories protected, organized, and ready for transport or storage.
Why RS Ultra
Maximum RS package. Minimum compromises.
Hapstone RS Ultra is built for users who want the most complete RS setup from the beginning. With two pairs of Small Universal Angled Clamps, advanced stone holder, precise angle adjuster, digital angle gauge, and case included, it is the flagship configuration of the Hapstone RS family.
Most complete RS setup
The maximum configuration in the Hapstone RS family, assembled for broad functionality right out of the box.
Universal clamp setup
Includes two pairs of Small Universal Angled Clamps for wider sharpening coverage.
Premium accessories included
Case, digital angle gauge, precise angle adjuster, advanced stone holder, marker, screwdriver, and spare screws.
Ready to work
A strong all-in-one solution for users who want a complete system instead of adding upgrades step by step.
Sharpening range
Designed for many types of knives.
The Hapstone RS system is designed to handle a wide range of blade sizes and thicknesses. It can sharpen knives from 40 to 230 mm in length and up to 6 mm thick.
What’s included
Full kit contents.
The delivery pack contains everything you need to start sharpening immediately, including premium RS accessories and storage.
Core system
1 Platform 1 Rotating Clamp Module for Hapstone RS 1 Advanced Stone Holder with Linear Bearing for Hapstone RS
Clamps
2 pairs of Small Universal Angled Clamps for Hapstone RS
Adjustment & Measurement
1 Precise Angle Adjuster for Hapstone RS 1 Digital Angle Gauge Hapstone 1 Stopper
Accessories
1 Case for Hapstone RS 1 Ball-End Hex Screwdriver (3 mm) Spare Clamp Screws 1 King Size Sharpie Marker Hapstone stickers
Technical details
Specifications
System
Hapstone RS Ultra
Configuration
Maximum configuration of the Hapstone RS family
Weight
88.18 oz (2.5 kg)
System Size
11" × 5.5" × 7.4" (280 × 143 × 188 mm)
Minimum Blade Length
1.6" (40 mm)
Maximum Blade Length
9.1" (230 mm)
Maximum Blade Thickness
0.3" (6 mm)
Sharpening Angle Range
12° to 30°
Stone Compatibility
6" × 1" (150 × 25 mm) 4" × 1" (100 × 25 mm)
Maximum Number of Clamps
4
Base
Heavy 8 mm steel base with silicone feet
Materials
Aircraft aluminum, stainless steel guides, steel base
Sharpening Stones
Not included
Warranty
5 years
Note: Sharpening stones are not included. Please select compatible stones and optional accessories using the product options above.
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Customer Reviews
Overall rating: 5.0 / 5 from 7 reviews.
C'est un super ensemble que j'ai reçu !
C'est ma première vraie expérience en affûtage de couteaux et j'ai réussi à obtenir un tranchant rasoir/ miroir dès la première utilisation sur un grand couteau de cuisine (angle à 22,5°) !
Mes choix de pierres : un ensemble Boride T2 + fluides 1/2 et 0,25 micron sur cuir.
J'ai aménagé dans la sacoche 2 saignées pour y mettre les 2 clés Allen qui complètent le tournevis Allen 😉
Stratégie de serrage de la lame sur les mors des pinces : visser au contact la vis à tête triangulaire puis visser avec la vis sans tête : cela permet de serrer à plat sur l'angle de la lame.
Je suis ravi par l'ensemble et sa qualité !
Store owner replied:
Merci pour votre avis, Charles ! Nous sommes ravis d'apprendre que votre première expérience d'affûtage a été un succès et que vous avez obtenu un tranchant rasoir dès la première utilisation. Merci également d'avoir partagé vos conseils et votre configuration. Bonne affûtage !
Such a well made and thought of system. Well packaged, good user manual.
Super easy to assemble and solid build quality. For the price you’re getting a premium experience.
I’m a professional knife sharpener, and I’ve sharpened well over a thousand knives on fixed angle systems.
And this is a joy to use!
Sturdy for even long or heavy knives, clamps works well, you can adjust for small knives, or really long knives. The angle adjustment is superb, easy to use, feels well made and easy to use.
I can highly recommend RS ultra, for beginners and for experienced users.
Store owner replied:
We truly appreciate your feedback, Steffen! It means a lot to hear such high praise from a professional—thank you for the recommendation.
Store owner replied:
We're happy to hear the RS Ultra has been such a great fit for you, Gabriel! Thank you for your kind words—we're glad you appreciate both its performance and its design.
Je suis en train d’apprendre le maniement du matériel merci
Store owner replied:
Merci, Christophe ! Heureux d’apprendre que vous prenez en main le matériel — n’hésitez pas si vous avez des questions !
Excellent aiguiseur. L'utilisation est d'une simplicité déconcertante. La précision de réglage de l'angle est vraiment top et favorise un aiguisage parfait.
Store owner replied:
Thanks, Alexandre! Happy to hear it helps you achieve perfect sharpening results.
what an incredibly beautiful device this is.
started immediately after it arrived.
in the meantime sharpened several knives from edc to my japanese kitchen knives.
everything is sharper than ever.
solid construction and very precise adjustment in degrees.
really recommended...
is also certainly not the last thing I will order from hapstone..
thanks again for the fast and good service...
Store owner replied:
Thank you so much for the kind words! We’re thrilled to hear you’re enjoying the sharpener and getting great results on all your knives. Looking forward to your next order — we’re always here for you!
