Abstract: Provided is a fixation device having a shaft rotatable about a longitudinal axis with a first cutter at a first, distal end; a guide body on the shaft shaped to taper outwardly towards the first end of the shaft; an elongate sleeve disposed surroundingly about the shaft; and a flareable end formation at a first, distal end of the elongate sleeve. The guide body and the flareable end formation urge the sleeve towards the first end over the guide body and flare the end formation outward from the shaft. A tensioning mechanism forms part of the fixation device and is associated with a second end of the sleeve and operable selectively to urge the shaft relative to the sleeve back towards the second end. An associated method of installing a fixation device into a substrate is also described.