Flashpoint Budget Macro Focusing Rail Set with 4 Way, Fine Control, Camera Focusing Rail for Macro Photography.
Flashpoint rail sysytem provides rack and pinion movement, fine focusing adjustments. Two 6" rails allow movement in four directions, right, left, forward and backward. Mounts on, and accepts 1/4x20 threaded screws, will fit most tripods and copy stands. Positive locking knobs assure rock-steady focus.