This is a right side (when looking forward from the operating position at the handlebars) auger from a Craftsman snowblower. It fits a 3/4 auger shaft and has the id stamp R24396.
This is a hard to find hex shaft from a 10HP 33 Estate/Noma snowblower. Parts are no longer available new. Any questions just ask. I have more parts for these machines, let me know what you need.