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Optional upgrade for Hapstone R1/R2/V5/V7 sharpeners that replaces the standard PTFE insert for smoother shaft movement.
Upgrade
This optional upgrade replaces the standard PTFE insert, delivering smoother shaft movement and eliminating the need for lubrication or cleaning.
Compatibility
Originally a hallmark of the flagship Hapstone R1, this ball-bearing unit is now available for select models, including the second revision of the Hapstone M2. Enjoy the benefits of this premium upgrade for effortless and accurate sharpening.
