Starrett CPR-1224S Reversible Protractor Head for Combination Squares and Bevel Protractors

The Starrett CPR-1224S is a precision reversible protractor head designed for use with combination squares, combination sets, and bevel protractors. Built from cast iron with a black smooth finish and chrome-accented turret, this protractor head delivers the rugged durability and exacting accuracy that Starrett has been known for since 1880.

The reversible design allows the head to be flipped and used from either side of the blade, offering greater flexibility for layout and angle measurement tasks. Double graduations read 0 to 180 degrees in both directions, and a built-in spirit level ensures accurate horizontal referencing on the workpiece. Working surfaces are ground to a demanding +/- 0.00001" tolerance for maximum measurement confidence.

Key Features:

• Reversible cast iron protractor head
• Black smooth finish with chrome on turret
• Double graduations: 0–180 degrees, readable from both directions
• Built-in spirit level for horizontal reference
• Working surfaces ground to +/- 0.00001" tolerance
• Compatible with 12", 18", and 24" blades, as well as 300mm and 600mm blades (interchangeable)
• Made in the USA

The CPR-1224S is sold as a protractor head only and is compatible with standard Starrett combination square blades (note: not compatible with Starrett 33J and 8 Combination Squares). It is the chrome-turret variant of the classic PR-1224S, offering an upgraded appearance alongside the same precision construction.