A vaginal speculum comprising a pair of pivotally connected plastic components A, B, each of which comprises a handle 11, 13 and a beak element 12, 14. In which a plastic threaded nut and runner mechanism D, C is provided for effecting controlled relative movement of the two components A, B. The runner C being pivotally connected to one of the handles and arranged to pass through an opening 16 in the other handle. The opening 16 is provided with inwardly extending guide formations 17, 18 that engage the runner. The runner may comprise projecting cylindrical pins for pivotal connection to a handle. A handle may be provided with a recess to receive the nut.
