This unique New Focus brand optical rail system combines an exceptionally light-weight rail with the ultimate convenience of quick release carriers. The rail uses an enhanced box-beam cross section to reduce weight without sacrificing stiffness. The carriers, which are available in three different types, have a spring-loaded lever enabling one-handed lock and release operation. An 8-32 (M4) screw permanently locks the carriers in place. The rails are attached to the optical table with table clamps so that virtually any position or orientation is possible. For your convenience, there are both metric and English scales on each rail.
Model 9743 optical rail carrier showing quick-release lever
Model 9732 , showing English and metric scale