STM 4″ Engineer’s Precision Square, 231015
- Blade Length (Inch): 4
- Bevel Edge: No
- Hardened spring steel blades are permanently fixed to the stock by means of tapered self-locking rivets which ensure complete rigidity. Both the blade and stock are precisely ground to ensure straightness and parallelism.
- Internal and external squareness as per BS 939 Grade B
Technical specs
- Material: Hardened Spring Steel
- Squareness: 0.00063″
- Model Number: SS/A/4





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