Fotasy BHS Ball Head with Arca-Swiss Compatible Style QR Clamp and Plate (Black) Accommodate any Arca style plate from various makers, eg. Wimberley, Jobu Design, Arca-Swiss, Kirk Enterprises, Markins, etc. It has separate controls for ball friction, pan and ball locking Bottom thread: 3/8" with 1/4" adapter. 50mm Quick Release Plate Included Weight: 14 oz./ 395G