A device is for containing a bone graft material. The device includes a mesh outer sleeve extending longitudinally from a proximal end to a distal end and sized and shaped to correspond to a profile of an outer surface of a target bone. The outer sleeve includes a plurality of openings extending therethrough, longitudinally adjacent ones of the plurality of openings being offset from one another relative to a longitudinal axis of the device. The device also includes a mesh inner sleeve connected to an interior surface of the outer sleeve via at least one strut so that a bone graft collecting space is defined therebetween The inner sleeve is sized and shaped to correspond to a profile of a medullary canal of the target bone. The inner sleeve includes a plurality of openings extending therethrough.