an adjustable reaming device can include a proximal reamer and a positionable element . the positionable element removably attaches to the proximal reamer at one of a plurality of discrete longitudinal locations along the proximal reamer . a distal end of the positionable element forms a stop , which can contact a proximal end of a distal reamer and thereby limit distal motion of the proximal reamer with respect to the distal reamer . when the distal reamer is in contact with the positionable element , the distal reamer and proximal reamer are longitudinally offset by a one of a plurality of specified offsets . in some examples , the specified offsets correspond to a plurality of specified , discrete lengths for which implantable femoral stems are available .