They are placed over top the skate blade to cover it. They protect the blades from cement, rocks, metal or wood which can damage the skate blade, resulting in uneven skating, due to rusty and dull blades.
These coverings are placed atop the skate blade to protect them. They prevent the blades from being damaged by cement, rocks, metal, or wood, which can lead to uneven skating due to rusted and dulled blades.