In the PIP joint, extension is more limited because of the two so called check-rein ligaments, which attach the volar plate to the proximal phalanx.
Trine Rein | Yevgeny Rein | yaw bearing | Slewing bearing | Rein Raud | Needle roller bearing | Mark Rein·Hagen | Mark Rein-Hagen | Jeff Rein | Irving J. Rein | Geeks Bearing Gifts | Fluid bearing | Bearing rein | ball bearing | Badger Books SF-58 and SF-61, both dating from 1961 and bearing the byline "John E. Muller" -- but "The Mind Makers" is by Lionel Fanthorpe |