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Hapstone Modular Platform
Hapstone R2 Ultra is the most complete configuration in the R2 family, combining two clamp types, precise angle adjustment, convex sharpening capability, thickness compensation, and a dedicated storage case in one fully equipped system.
Maximum setup
Hapstone R2 Ultra is the flagship configuration of the R2 family. It brings together the core platform and the most important add-ons in one package, so the system is fully equipped from day one.
Versatility
With Universal Angled Clamps for everyday knives and Whole Milled Angled Clamps for fillet and hunting knives, the R2 Ultra is built to handle a broader variety of blade shapes and sharpening tasks.
Precision
The included Precise Angle Adjuster allows smooth and accurate micro-adjustments of the sharpening angle. It gives the system a more controlled feel in use and makes fine angle tuning easy and repeatable.
Whole milled clamps
Whole Milled Angled (Fillet) Clamps are especially well suited for fillet knives and hunting knives. Their rigid one-piece construction provides stable blade holding and a confident feel during sharpening.
Universal clamps
Universal Angled Clamps are designed for the widest range of common knife types. They offer flexible positioning and make the system more adaptable across different blade lengths, profiles, and geometries.
Why R2 Ultra
Hapstone R2 Ultra combines a solid mechanical platform with thoughtful ergonomics and simple operation. It is built for users who want the fullest possible configuration without having to assemble it step by step later.
Two clamp styles are included in one package for broader compatibility with different knives.
The Precise Angle Adjuster allows smooth and accurate micro-adjustments during sharpening.
Includes both the Convex Adapter and Thickness Compensator as part of the standard configuration.
This is the most complete R2 system here and now, with no immediate add-ons required.
Storage
The included Case for Hapstone R2 keeps the system protected and organized during storage and transport. It is part of what makes the R2 Ultra the most complete configuration in the family.
Clamp comparison
| Universal Angled Clamps | Designed for the widest range of everyday knives. They offer flexible positioning and adapt well to different blade lengths, shapes, and common sharpening tasks. |
|---|---|
| Whole Milled Angled Clamps | Built with rigid one-piece construction and especially well suited for fillet knives, hunting knives, and other narrow or flexible blades where stable clamping is especially important. |
| Why both matter | Including both clamp styles in one package gives Hapstone R2 Ultra broader real-world versatility and lets you choose the best clamping solution for each knife. |
Convex adapter
The Convex Adapter for Hapstone (Gen 2) expands the system’s capability and allows convex edge geometry without needing to buy an additional module separately.
Thickness compensator
The Thickness Compensator helps maintain a more consistent sharpening angle when switching between stones of different thickness.
What’s included
Hapstone R2 Ultra includes the R2 platform together with two clamp styles, precise angle adjustment, convex capability, thickness compensation, storage case, and essential accessories — making it the most complete configuration in the family.
1 Platform base
1 Horizontal guide rod
1 Lightweight alloy guide rod with wooden handle
Rotating clamp module
Adjustable flipping strength
1 pair of Universal Angled Clamps for Hapstone R2
1 pair of Whole Milled Angled (Fillet) Clamps for Hapstone R2
1 Precise Angle Adjuster for Hapstone
1 Thickness Compensator for Precise Angle Adjuster
1 Convex Adapter for Hapstone (Gen 2)
1 Digital Angle Gauge Hapstone
1 Ball-End Hex Screwdriver 4 mm “Fire Orange” for Hapstone R2
1 Stopper ring
1 Spring-assisted stopper ring
1 Case for Hapstone R2
Video
Watch the video to see how this product works in real sharpening use.
Technical details
| System | Hapstone R2 Ultra |
|---|---|
| Platform | Hapstone Modular Platform |
| Clamp Module | Rotating clamp module with adjustable flipping strength |
| Included Clamps | Universal Angled Clamps for Hapstone R2 (2 pcs) Whole Milled Angled (Fillet) Clamps for Hapstone R2 (2 pcs) |
| Included Modules | Precise Angle Adjuster Convex Adapter for Hapstone (Gen 2) Thickness Compensator for Precise Angle Adjuster |
| Sharpening Angle Range | 9° to 40° per side |
| Blade Capacity | Up to 320 mm long and up to 8 mm thick |
| Stone Compatibility | 6" (160 mm) stones, Edge Pro & KME formats |
| Pivot Type | Linear ball-bearing pivot, no lubrication needed |
| Guide Rod | Lightweight alloy guide rod with wooden handle |
| Case | Included |
| Sharpening Stones | Not included |
| Warranty | 5 years |
Compatibility
| Included Clamps | Universal Angled Clamps for Hapstone R2 (included) Whole Milled Angled (Fillet) Clamps for Hapstone R2 (included) |
|---|---|
| Included Add-ons | Precise Angle Adjuster for Hapstone Convex Adapter for Hapstone (Gen 2) Thickness Compensator for Precise Angle Adjuster Case for Hapstone R2 |
| Stone Formats | Compatible with 6" (160 mm) stones in Edge Pro and KME formats |
Note: Sharpening stones are not included. Please select compatible stones using the product options above.
