The ShopStrop is the only system in the group that is not self-powered. It is mounted on a drill press, which provides the power and a stable base for the sharpening platform. The ShopStrop uses three thin, 4-in.-dia. platters that slide over a mandrel, which is chucked in the drill press. The finest grade of abrasive paper is 600 grit, but a leather disk beneath the platters can be charged with buffing compound for final honing. The tool holder is supported well by a work platform and guide post.

The thin aluminum platters were distorted, which caused excessive wobble. I could create a mirror polish quickly, but the backs and bevels weren’t flat. Also, for each abrasive change, the mandrel must be removed from the drill chuck and the platter re-leveled with the work platform.

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