Check the listing for details. Modified Square Tool Stairstringer Square Pipefitter Square Centerhead Square. Condition: New. Listed at 35.95 USD. The Modified Square Tool Made in U S A 7 Squaring Tools in one Plus more! Modified Square Tool Measures heights and depths simultaneously/instantly Easily use for regular squaring 4 90 degree angles to work with Combination squaring effect for straight line drawing presets you for 1 1/2, 2 1/2 and 3 inch depths /practical depths in a lot of trades. Use as a Tri-Square Zero/Zero Center head finder super nice feature in the Modified Square T-Square Zero/Zero Rule 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!