The Tosa Tool (TT) standard hole pattern is two nestled 1.2500″ grids on the same plate:

  • Precision bore grid: Ø.5010″ ±.0002 TYP on 1.2500″ centers — for locating pins and accurate repeat setups
  • Threaded hole grid: 1/2-13 UNC 2B thru TYP on 1.2500″ centers, with Ø.5625 × .19 counterbore (~3/16″ deep) — for clamps, bolts, and modular accessories

Bores and threads alternate (neighboring holes on 0.625″ centers). Made in USA. Built for repeatable location and standard 1/2″ modular hardware — fixture your way without a proprietary lock-in.