Toolmakers Square, 4", Starrett
- Starrett toolmaker's grade stainless steel square
- Starrett catalog number 3020-4
- Blade length 3 31/32"
- Beam length 2 31/32"
- Squareness accuracy to .0002" (0.005mm) for every 6" (150mm)
These high quality toolmaker's squares feature hardened, ground, and lapped stainless steel construction on both the blade and the beam. The beam is machined at the inner corner for clearance.