2x4 notchout design, measure and mark 3 work points in one step. Great for all materials wood, sheetmetal, leather etc. etc.

Square your pipe flanges in 2 moves, Mark your rise and run in one move, or notch out for tucking in your tread on your decks.

Easily set your spindles and balusters, also center head good for core drilling or for putting on you lathe and turning.

The More you pick up The Modified Square Tool you will be aware of its many capabilities.  Saves time eliminates a lot of steps to one or two moves.

AMERICAN INVENTED AND MADE IN THE USA!