The object is four wood splints made by A. M. Day & Co Bennington VT. label H.C.18.104.22.168.
The splints were patented and manufactured by Dr. Almiron M. Day. He securing his patents during the mid 1850’s through the mid 1860’s, Dr. Day’s splints were generally used in the army hospitals during the Civil War. http://www.mcpheetersantiquemilitaria.com/12_army_medical/12_item_016.htm
A. M. Day & Co Bennington VT