Haoge Quick Release QR Clamp Adapter Convertor for Manfrotto RC2 System to Arca-Swiss Compatible The Haoge Quick Release Clamp for Arca-Type Plates with Manfrotto RC2 Base is a specialty Arca Swiss-type clamp that features a Bogen/Manfrotto RC2 plate/base at its bottom. It allows you to add Arca-type plates to your Bogen/Manfrotto RC2 quick release system Note: It can't be used for Manfrotto Fluid Head. Recommend Haoge CP-MA90 Adapter for Manfrotto Fluid Head ( ASIN: B07D92DZ7K).