Popularized by Stuart Batty, the 40/40 grind is widely used across the globe. Ron introduces a set up block for use with the OneWay Wolverine VariGrind 1 for achieving this very popular bowl gouge grind. Popularized by Stuart Batty, the 40/40 grind is widely used across the globe. Ron introduces a set up block for use with the OneWay Wolverine VariGrind 1 for achieving this very popular bowl gouge grind.

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