Using a dovetail structure, and HG series of slide rail use,convenient 
adjustment, good repeatability.With plastic head rigid locking handwheel, firm locking, not 
to hurt the optical bench.The width of the sliding seat suitablefor different distances are 
needed, the sliding seat can horizontal trimming.Adjustmentmechanism of ultrafine M6x0.25 
screw drive, precision linear guide rail guide.Spring return, highprecision, good stability