Co-invented by Merrill inventor and best-selling author Mark Duginske and Tim Zimmerman of Mitchell Metal Products, the USA system accurately measures the length of a board or the location of a hole. Patent pending.

It is a two-part system: a round base secures to a piece of wood or an aluminum T-slot track, and a curved arm positions the end of the board in relation to the drill bit or saw blade. Use it with a pocket hole jig, table saw, drill press, miter saw or radial arm saw. It is designed for wood and also works with metal.

Available late December 2026.

Pricing
Single flip stop: $16.99
Two flip stops: $29.99
Five flip stops: $59.99
Gang stop kit, 6 flip stop arms: $17.99 (requires a flip stop on each end of the all-thread rod)

Show handout (PDF) | Price list (PDF)

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