A device including a rotational locking piece. The rotational locking piece includes a first portion and a second portion. The first portion is rotationally connected to the second portion. The first portion can be locked in relation to the second portion by a locking device. The locking device includes a locking member having a locking portion. A holster is connected to the rotational locking device. The rotational locking piece locks the holster in a many positions and the locking portion prevents the first portion from rotating when it is inserted in a locking groove formed on the first portion.