lot of 6 old antique 19th or early 20th century cast iron skate keys

Lot of six antique nickel plated cast iron key wrenches for antique ice skates or roller skates. These are the heavy old keys, not the 1950s stamped steel keys. They measure 1 5/8" high and 1 7/8" across the key ears. The round key body measures 9/16" across. They work with a 5/16" square shank.