d_wrist_circumference = [22.8, 10.7, 16.4, 18.5]
width = d_wrist_circumference[0] + d_wrist_circumference[1] + d_wrist_circumference[2] + d_wrist_circumference[3]
length = 120.0
hand_thickness = 24.0
corner_radius = 5.0

// At first I thought this was going to be symmetric,
// but I measured intentionally to not be symmetric,
// because your wrist isn't a perfect cylindrical surface
brace_base = startSketchOn(XY)
  |> startProfileAt([corner_radius, 0], %)
  |> line(end = [width - corner_radius, 0.0])
  |> tangentialArc(end = [corner_radius, corner_radius])
  |> yLine(length = 25.0 - corner_radius)
  |> tangentialArc(end = [-corner_radius, corner_radius])
  |> xLine(length = -(d_wrist_circumference[0] - (corner_radius * 2)))
  |> tangentialArc(end = [-corner_radius, corner_radius])
  |> yLine(length = length - 25.0 - 23.0 - (corner_radius * 2))
  |> tangentialArc(end = [corner_radius, corner_radius])
  |> xLine(length = 15.0 - (corner_radius * 2))
  |> tangentialArc(end = [corner_radius, corner_radius])
  |> yLine(length = 23.0 - corner_radius)
  |> tangentialArc(end = [-corner_radius, corner_radius])
  |> xLine(length = -(hand_thickness + 15.0 + 15.0 - (corner_radius * 2)))
  |> tangentialArc(end = [-corner_radius, -corner_radius])
  |> yLine(length = -(23.0 - corner_radius))
  |> tangentialArc(end = [corner_radius, -corner_radius])
  |> xLine(length = 15.0 - (corner_radius * 2))
  |> tangentialArc(end = [corner_radius, -corner_radius])
  |> yLine(length = -(length - 25.0 - 23.0 - (corner_radius * 2)))
  |> tangentialArc(end = [-corner_radius, -corner_radius])
  |> xLine(length = -(d_wrist_circumference[1] + d_wrist_circumference[2] + d_wrist_circumference[3] - hand_thickness - corner_radius))
  |> tangentialArc(end = [-corner_radius, -corner_radius])
  |> yLine(length = -(25.0 - corner_radius))
  |> tangentialArc(end = [corner_radius, -corner_radius])
  |> close(%)

inner = startSketchOn(XY)
  |> startProfileAt([0, 0], %)
  |> xLine(length = 1.0)
  |> tangentialArc(end = [corner_radius, corner_radius])
  |> yLine(length = 25.0 - (corner_radius * 2))
  |> tangentialArc(end = [-corner_radius, corner_radius])
  |> xLine(length = -1.0)
  |> tangentialArc(end = [-corner_radius, -corner_radius])
  |> yLine(length = -(25.0 - (corner_radius * 2)))
  |> tangentialArc(end = [corner_radius, -corner_radius])
  |> close(%)

final = brace_base
  |> hole(inner, %)
  |> extrude(length = 3.0)