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Hapstone RS Family
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.
Configuration changes effective 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 | ✔ | ✔ |
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
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
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
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
The Precise Angle Adjuster for Hapstone RS helps make small angle changes faster, easier, and more repeatable during sharpening.
Storage
The included case helps keep the system and accessories protected, organized, and ready for transport or storage.
Why RS Ultra
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.
The maximum configuration in the Hapstone RS family, assembled for broad functionality right out of the box.
Includes two pairs of Small Universal Angled Clamps for wider sharpening coverage.
Case, digital angle gauge, precise angle adjuster, advanced stone holder, marker, screwdriver, and spare screws.
A strong all-in-one solution for users who want a complete system instead of adding upgrades step by step.
Sharpening range
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
The delivery pack contains everything you need to start sharpening immediately, including premium RS accessories and storage.
1 Platform
1 Rotating Clamp Module for Hapstone RS
1 Advanced Stone Holder with Linear Bearing for Hapstone RS
2 pairs of Small Universal Angled Clamps for Hapstone RS
1 Precise Angle Adjuster for Hapstone RS
1 Digital Angle Gauge Hapstone
1 Stopper
1 Case for Hapstone RS
1 Ball-End Hex Screwdriver (3 mm)
Spare Clamp Screws
1 King Size Sharpie Marker
Hapstone stickers
Technical details
| 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.
