Bison Finished A1-20 Adapter Plate 7-873-4020 for 40" Chucks Bison Brand Bison Type Adapter Plate Style Finished Model Number 7-873-4020 Application 40" Chuck Spindle Taper A1-20 / A2-20 Body Material Steel Country of Origin Poland Includes Set of Mounting... Qty in Cart: 0 Price: Subtotal: