An instrument assembly can include a handle and an instrument. The handle can include an inner member and an outer member. The inner member can include a rod and a first tip. The outer member can include a second tip and can define a cannulation. The instrument can define a pocket configured to receive the second tip of the outer member. The handle can be adjustable at a desired angle relative to the instrument when the second tip of the outer member is disposed in the pocket and the first tip of the inner member is positioned in the cannulation spaced apart from the second tip. The first tip can be configured to expand the second tip radially outward such that the second tip engages the pocket and locks the handle at the desired angle when the first tip is positioned in the cannulation in engagement with the second tip.
