documentclass[tikz,border=3.14]{standalone}

pgfkeys
  {%
    /tikz/kim/.cd
    ,gap/.initial=.01cm
    ,radius/.initial=1cm
    ,inner/.initial=.2cm
  }
newcommand*kimvalue[1]{pgfkeysvalueof{/tikz/kim/#1}}

begin{document}
begin{tikzpicture}
  draw[red]
    (-kimvalue{radius},-kimvalue{gap})
    arc
      [%
        start angle={atan2(-kimvalue{gap},-kimvalue{radius})},
        end angle={atan2(-kimvalue{gap},kimvalue{radius})},
        radius=kimvalue{radius}
      ]
    -- (kimvalue{inner},-kimvalue{gap})
    arc
      [%
        start angle={atan2(-kimvalue{gap},kimvalue{inner})},
        end angle={atan2(-kimvalue{gap},-kimvalue{inner})},
        radius=kimvalue{inner}
      ]
    -- cycle
    ;
  draw
    (-kimvalue{radius},kimvalue{gap})
    arc
      [%
        start angle={atan2(kimvalue{gap},-kimvalue{radius})},
        end angle={atan2(kimvalue{gap},kimvalue{radius})},
        radius=kimvalue{radius}
      ]
    -- (kimvalue{inner},kimvalue{gap})
    arc
      [%
        start angle={atan2(kimvalue{gap},kimvalue{inner})},
        end angle={atan2(kimvalue{gap},-kimvalue{inner})},
        radius=kimvalue{inner}
      ]
    -- cycle
    ;
end{tikzpicture}
end{document}