Starrett 643JZ Dial Depth Gage:
- The knife-edge base has a cutout so that the conical point can be precisely positioned for close work
- Point is 1/2″ (12.7mm) long with a 60º included angle
- In action, the inspector gently pushes the point down to read zero with the base and then pushes down to make the needle point contact the workpiece to take the measurement
