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The Starrett 20-24 Master Precision Square is a high-accuracy reference tool designed for inspecting squareness, setting up machinery, and verifying fixtures in precision machining and quality control environments. Featuring a 24" hardened steel blade and a heavy-duty base, this square is engineered to maintain exact 90° alignment with exceptional stability. Starrett’s meticulous manufacturing standards ensure long-term reliability, making this master precision square an essential instrument for toolrooms, labs, and inspection departments.
| Model | 20-24 |
| Blade Length | 24" |
| Material | Hardened, ground steel blade with solid base |
| Type | Master Precision Square |
| Accuracy | Within ±0.0001" per inch (Starrett master grade) |
| Graduations | None (non-graduated) |
Shipping is FREE on all orders under 70 pounds shipped to the continental USA.
Freight shipping will be charged on larger, heavier items.
Shipping is FREE on all orders under 70 pounds shipped to the continental USA.
Freight shipping will be charged on larger, heavier items.
Price Match Guarantee.
Best prices online guaranteed.
30 Day Easy Returns.
Se Habla Español - Falamos Português
We will beat ANY price found online! Reach out to us for more information by calling at (617) 398-7852 or emailing us at support@precisionengineeringsupply.com.
Free 30 day returns! We pride ourselves in helping you with your needs Please reach out by calling at (617) 398-7852 or emailing us at support@precisionengineeringsupply.com to start your return.
Enjoy flexible payment options with Affirm. Split your purchase into easy, interest-free installments or choose a financing plan that fits your budget — all available directly at checkout.
The Starrett 20-24 Master Precision Square is a high-accuracy reference tool designed for inspecting squareness, setting up machinery, and verifying fixtures in precision machining and quality control environments. Featuring a 24" hardened steel blade and a heavy-duty base, this square is engineered to maintain exact 90° alignment with exceptional stability. Starrett’s meticulous manufacturing standards ensure long-term reliability, making this master precision square an essential instrument for toolrooms, labs, and inspection departments.
| Model | 20-24 |
| Blade Length | 24" |
| Material | Hardened, ground steel blade with solid base |
| Type | Master Precision Square |
| Accuracy | Within ±0.0001" per inch (Starrett master grade) |
| Graduations | None (non-graduated) |
Shipping is FREE on all orders under 70 pounds shipped to the continental USA.
Freight shipping will be charged on larger, heavier items.
Shipping is FREE on all orders under 70 pounds shipped to the continental USA.
Freight shipping will be charged on larger, heavier items.
Price Match Guarantee.
Best prices online guaranteed.
30 Day Easy Returns.
Se Habla Español - Falamos Português
We will beat ANY price found online! Reach out to us for more information by calling at (617) 398-7852 or emailing us at support@precisionengineeringsupply.com.
Free 30 day returns! We pride ourselves in helping you with your needs Please reach out by calling at (617) 398-7852 or emailing us at support@precisionengineeringsupply.com to start your return.
Enjoy flexible payment options with Affirm. Split your purchase into easy, interest-free installments or choose a financing plan that fits your budget — all available directly at checkout.
Starrett 20-24 Master Precision Square 24" Blade Catalog