This 39” long inner shaft comes installed and should be used to replace broken or worn shafts on these motors: M.SR, M.SRM, M.SRB M.TX, M.TXM, M.TXB M.LX, M.LXM, M.LXB M.PGX Use with outer sheaths S-77 or S-77N sold separately. IMPORTANT NOTE: S-93 Shaft MUST ship via UPS in larger carton to avoid damage (bending) that could occur if shipped in smaller, USPS carton. Also use to replace broken or worn shafts on these older, discontinued motors: M.SR, M.SRM, M.SRB-1/8HP models sold prior to Nov. 2005 M.L, M.LM, M.LB M.PG M.S, M.SM, M.SB M.CC, M.MM, M.DD M.R, M.RB M.K M.500, M.900 and M.990 Replacement shafts require a VERY light coating of Foredom grease before use. Be sure to UNPLUG your motor before doing any maintenance and NEVER operate your Foredom with the outer sheath removed. Check Out The Foredom Tools Catalog SKU: FOR-S-93 UPC: 098666719404 Brand: Foredom MPN: S-93 Made In: United States Micro-Tools makes every attempt to provide accurate information for each item. Actual packaging and/or specifications may be slightly different from the information and picture provided.C005A