The Jobu Design QRR-1 Ballhead Quick Release Replacement (1/4" Thru Hole) is a 2" wide replacement clamp that is compatible with all Arca Swiss-type plates and mounts. It features one countersunk hole that will work with either a 1/4"-20 flathead bolt, or a 6mm flathead bolt.
It is fully compatible with Bogen/Manfrotto's 484RC2 head, or with many other heads after doing a small modification (offered by manufacturer at no charge, please contact B&H Sales dept.), or with use of a longer bolt.
Jobu Design QRR-1 Ballhead Quick Release Replacement (1/4" Thru Hole)