The manfrotto 143a magic arm is a versatile aluminium articulating arm which can support up to 3kg and is designed to securely hold various accessories and enable quick positioning of whatever you attach to it ie lighting equipment or an additional camera the arm comes with a central locking lever that can lock all three pivot points tge arm has 58 studs on each end with a 38 female socket and a standard 20 female thread mount the arm comes with a camera platform but requires the