An instrument assembly includes a handle and an instrument. The handle includes an inner member and an outer member. The inner member includes a rod and a tip, and the outer member defines a cannulation configured to receive the inner member. In one example, the instrument includes a protrusion, the tip defines a first pocket configured to receive the protrusion, and the cannulation includes a second pocket. When the protrusion is positioned in the first pocket and the outer member is positioned on the inner member with the second pocket spaced apart from the tip, the handle is adjustable at a desired angle relative to the instrument. When the protrusion is positioned in the first pocket and the second pocket engages the tip, the second pocket is configured to compress the tip radially inward such that the first pocket engages the protrusion and locks the handle at the desired angle.