
13-672-1 SPI 2-3-4 Block Set
Matched 2-3-4 Block Set
Features include...
- Hardened Steel to RC 55-60, ground to surface finish 6-16 microinches.
- Squareness of all sides within 0.0003" per inch
- Five tapped holes (3/8" - 16), 18 untapped holes (3/8" dia.)