Haoge Combo Boss Adapter Convertor with CP-MAS Arca & Manfrotto Compatible Quick Release Clamp for Manfrotto Tripod Ball Head Clamp Replacement This combination of the Boss Adapter and the Arca & Manfrotto Compatible Clamp will fit virtually any Manfrotto ball head and produce a head that is Arca & Manfrotto RC2 compatible. Own a Manfrotto 484, 486, 488, 494, 496, 498, 054, 055 and 057 series ball head and wish to use AS (Arca-Swiss) compatible system and reserve RC2 system? The Haoge Female to Male Boss Adapter and Arca & Manfrotto Compatible Clamp allows you to more easily replace the clamp on your Manfrotto ball head. Arca-Swiss & Bogen 3157N & Manfrotto 200PL-14 RC2 compatible quick release clamp. The Boss Adapter has a ridge on one side which fits in the groove on the underside of the quick release clamp, and a ridge on the other side which fits in the groove on the Manfrotto ball head. Hex key and mounting screw are included Please note: The Manfrotto Ballhead and Plates are not included and are showing for illustration only.