An implant (100) for bone fixation is described. The implant comprises an elongate body having: a longitudinal axis； a triangular cross section transverse to the longitudinal axis； three outer faces (103) and three apexes (104) joining the outer faces that together give the implant its triangular cross-section； a central lumen (101) extending along the longitudinal axis of the elongate body； and a plurality of holes (102) with openings on the plurality of faces that are in fluid communication with the central lumen. The three apexes are chamfered at their proximal and distal end portions to provide three sloping shoulders that provide the implant with tapering proximal and distal end portions.
