Product Overview:
The document describes the 3020 Toolmakers’ Grade Stainless Steel Squares, which are precision tools used for ensuring squareness in various applications. These squares are made from high-quality stainless steel and are available in four different sizes: 3", 4", 6", and 12". A complete set containing all four sizes is also available.

Specifications:
- Material: Stainless steel construction for both blade and beam.
- Accuracy: Squareness accuracy of .00020" (0.005mm) for every 6.0" (150mm).
- Sizes: 3" (75mm), 4" (100mm), 6" (150mm), 12" (300mm).
- Blade Length: Measured from the inner edge of the beam to the end of the blade.
- Beam Length: Varies with each square size.

Design Features:
- Both the blade and beam are hardened, ground, and lapped for precision.
- The beam is machined at the inner corner to allow clearance for burrs or dirt.

Packaging:
- Each square is packed in a plastic case unless otherwise ordered.
- The 12" square and the complete set are shipped in a box with a fitted foam insert.
- Optional wood cases are available for purchase separately.

Additional Information:
- Bulletin No. 377
- Specifications are subject to change.
- For more information, contact 978-249-3551 or visit starrett.com.