Repairs and lubricates the joint cavity, ᵃˡˡᵒʷⁱⁿᵍ ᶠᵒʳ ᶠˡᵉˣⁱᵇˡᵉ ʳᵘⁿⁿⁱⁿᵍ ᵃⁿᵈ ʲᵘᵐᵖⁱⁿᵍ without any jamming.