This MAUREY MFG. SD x 1-5/8" QD Bushing, SD Series, 1-5/8" Bore is in unused condition and is guaranteed to be fully functional. This item came from a large pharmaceutical company that had surplus new old stock inventory. Please feel free to contact us with any questions. 1-5/8" Bore Diameter Bushings are split through the flange and taper to provide a true clamp on the shaft that is the equivalent of a shrink fit. Has a set screw over the key to help maintain the bushings position on the shaft until the cap screws are securely tightened. Reverse Mounting Possible. Carbon steel for strength and resistance to wear.