A security apparatus for securing a portable electronic device includes a base that defines a cavity extending from a first end of the base to a second end of the base. A holder is structured to engage the base. The holder includes an outer surface defining a plurality of channels terminating at a support surface and a holder groove defined on the outer surface of the holder. The security apparatus further includes a securing portion with a plurality of projections that are each structured to contact the support surface and engage one of the holder grooves. Rotation of the securing portion relative to the holder acts to move at least a portion of each of the plurality of projections into the holder channel and secure the securing portion to the holder, where the portable electronic device is secured between the securing portion and the holder.