Abstract: A seat belt retraction apparatus has a single retractor frame carrying reels each having a webbing attached at one end. The reels each have a pawl and ratchet means for locking each reel to prevent rotation of the reel in the belt extending direction. Upon application of predetermined force, an inertia type sensing means displaces a common actuating means to simultaneously actuate each pawl into locking engagement with its associated ratchet means to prevent rotation of each reel in a web extending direction. The preferred actuating means comprises a rotary lifter having a flexible portion for storing energy in the event that its associated pawl bounces on a tip of a ratchet tooth of a ratchet wheel. The actuating means and inertia means may be located outwardly of the sidewalls of the retractor frame.