This unit works well with a 1/2-inch or 3/8-inch chuck hand drill.
The Primer shafts are rated at 170,000 psi to ensure extended service life.
This oil pump primer tool is compatible with SB/BB Chevy V8 & Chevy V6 Engines, it fits for all small & big blocks including popular size of 327 350 355 383 388 400 406 427 434 454