Shower over bath attachment

[eljayv]

To make accessing shower, which is over he bath, safer for me the hospital occupational therapist sent me a stainless steel hose with and a shower head which she told me was to replace the existing shower head. Apparently I should purchase a pole and other bits for it including a fitting to replace shower head and connect the hose to. I guess the pole screws into the wall but I wonder if water could get in behind through the screw holes.
I can’t see how this would help me as my main concern is stepping over side of bath getting in and out.
Maybe I should just thank her and return it.