A handle assembly for a surgical tool including a handle having a distal end, and a first retaining mechanism attached to the distal end of the handle. The retaining mechanism includes a first retaining housing having a first central cavity for receiving a surgical tool, and a first locking mechanism moveable between first and second positions relative to the housing, the locking mechanism including a through hole for receiving the surgical tool. The handle assembly further includes a second retaining mechanism attached to a proximal end of the handle. The second retaining mechanism includes a second retaining housing having a second central cavity for receiving a handle extension, and a second locking mechanism moveable between first and second positions relative to the second retaining housing, the second locking mechanism having a through hole for receiving the handle extension.