Vintage Sioux Valve Seat Grinding Set

-This is a vintage Sioux automotive engine valve-seat grinding kit, used by machine shops and mechanics to resurface valve seats in cylinder heads.
-Sioux angular high-speed electric driver for valve-seat grinding
-Includes Sioux No. 1713 dressing tool for reshaping and truing the grinding wheels
-Assortment of valve-seat grinding stones in various sizes and profiles
-Includes multiple pilots, arbors and related attachments
-Stored in a fitted metal carrying case with divided interior
-Made in the USA by Albertson & Company Inc., Sioux City, Iowa
-Intended for vintage automotive and engine machine-shop work
-Exact inventory and completeness of the set have not been confirmed
-Older used condition with some oxidation, finish wear and deterioration to the case