For sale is a used Bison 6-1/2″ Chuck Back Plate, 2-1/4″-8 TPI, in good usable condition. Has been turned down to approx 5-1/8″ dia, 1/8″ deep, 5-3/4 bolt circle. Please view all pics as they are part of the description. I try to describe most of the items to the best of my ability, there are times when hubby inserts info onto a Post-It-Note that you will see in the pics. Please view all pics, as they are part of the description, this also applies to my “odds & ends” and “Lot of” items, as it is too time-consuming to describe each and every item. As long as I can package the tools safely, I’ll combine everything as cost-effective as possible. Please do NOT pay me until I send you a combined invoice (if applicable). We don’t go to the post office daily!