A sleeve for attachment to an end of a bone fixation element includes an elongated tubular element having a central bore extending therethrough. The tubular element has a proximal portion and a distal portion connected to one another by a web. The proximal and distal portions are separated from one another by a slot extending into the elongated tubular element. The is being sized so that, application of a shearing force to the proximal portion axially displaces the proximal portion relative to the distal portion deforming the web so that the web partially overlays the central bore locking an element received therein in the central bore
