Zero Level Adapter for Hapstone S4 Easy Zeroing. Precise Angle Measurement. Simplify angle measurement with the Zero Level Adapter for Hapstone S4. This compact accessory mounts directly onto the sharpening...

Small Knives. Greater Stability. Precise Sharpening. Improve the stability and precision of your Hapstone S4 with the Connection Adapter for Clamps. Designed to connect both clamps on the rotating unit,...

Unlock the Power of Convex Sharpening. Expand the capabilities of your Hapstone S4 with the Convex Adapter. Designed for precise and consistent convex sharpening, this compact accessory helps create durable,...

Case for Hapstone S4 Protection for your sharpening system. Designed for Hapstone S4. Compact. Organized. Ready to travel. Compatibility Made for Hapstone S4. Designed specifically for the compact Hapstone S4...

Convex Mini-Adapter Made of aircraft aluminum, the adapters are anodized for increased durability. Angle Offset Angle for sharpening: 4° Angle Offset Angle for sharpening: 8° Angle Offset Angle for sharpening:...