Taft-Peirce 3″ Cylinder Square

• Made of high-quality, heat treated alloy steel.
• Provides one of the most reliable 90 reference standards available.
• Periphery is ground between centers, straight and round within the tolerance specified for each size, with an extremely fine micro finish.
• Recessed ends, provided with self-cleaning dirt grooves, are ground and lapped square with the axis.
• Supplied in a finished wood case with hinged cover.