Starrett Attachment for Combination Squares - 289A. Designed for combo squares for laying out key seats, scribing horizontal lines, measuring diameters, etc.   Made in USA.
,For California Residents:,   WARNING: Cancer & Reproductive Harm - www.P65Warnings.ca.gov,WARNING: Drilling, sawing, sanding or machining wood products can expose you to wood dust, a substance known to the State of California to cause cancer. Avoid inhaling wood dust or use a dust mask or other safeguards for personal protection. For more information go to www.P65Warnings.ca.gov/wood Starrett Attachment for Combination Squares - 289A