Optics Plate For Arca Swiss® Mount Systems - Optics Plate 4'''' 1/2''''-20 Thread For Arca Swiss Mount Black

From Brownells.com

Make sure your "quick change" Arca SwissA(R) mount system is truly quick change by carrying extra BOGA(R) 4" Optic Plates with you while on the go. Simply utilize the A 1/4-20 mounting stud to put a plate on every optic & camera you have & be ready to quickly change out your gear. A 3/8-16 adapter is also included for universal fit. Mfg: Bog Gear Llc