NIB RCBS Accessory Plate -3. Nice way to have a plate to mount various RCBS products without drilling multiple holes in your bench. RCBS description below: Save time, space and eliminate a loading bench top full of holes. Simply attach the Accessory Base Plate-3 to any work surface, then use the pre-tapped, letter-coded holes to quickly mount or dismount RCBS Pro Chucker 5, Pro Chucker 7, the Grand shotshell, Rock Chucker Supreme, Summit, Trim Pro-2 Case Trimmers, Trim Pro Case Trimmers, Powder Measure Stand, Lube-A-Matic-2, Reloader Special Presses, Rock Chucker Presses, Pro 2000, Turret Press, AmmoMaster, Partner Press and Priming Tools. $35 shipped within lower 48 states.