A safety needle pack has a safe needle device contained within a housing 10, for use with a syringe 20. The device has a needle hub 16 supporting a needle 17 and a sleeve 22 is slidably mounted on the hub for movement between an initial position to an intermediate position where the tip region 31 of the needle 17 projects from the sleeve 22 and a protecting position. Following use of the safe needle device, the sleeve 22 is moved under the action of a spring 24,29,30 to the protecting position, a locking mechanism 29,40 then restraining the sleeve in that position. The rotational connection of a syringe 20 to the needle hub 16 turns the safe needle device within its housing 10, this causing the sleeve 22 to move rearwardly with respect to the housing from its initial position to its intermediate position so as to be ready for performing a medical procedure.
