Part Number: 4980. Q: Is the Astro 4980 compatible with standard. 401 shank chisels?. Manufacturer: Astro Pneumatic. 0.498" shank size for heavy-duty chisels and rivet sets. Shank Size: 0.498". A: No, this model uses a larger 0.498" shank and requires compatible heavy-duty chisels.
