RCBS ACCESSORY BASE PLATE-3 Save time, space and eliminate a loading bench top full of holes. Simply attach the 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, Powder Measure Stand, Lube-A-Matic-2, Reloader Special, Rock Chucker, Pro 2000, Turret Press, AmmoMaster, Partner Press and the APS Bench Mounted, Automatic and Priming Tools. Measures approximately 10" x 6" x 1" Fastening hardware included.