F20 Square Punch with 4mm Single Keyway
- “A” Stands for Punch Size
- Equivalent Part Numbers: AP-121, CST-221, GFM-40, PIR-EA, SCOT-40
- Commonly Paired with: F59 Square Dies,
- Used by these Ironworkers: Kingsland, Peddinghaus.
# 1 Source of Ironworkers Punches and Dies in Canada