They are like this…
https://www.amazon.com/EasySwing-Totem-Livestock-Comfort-Animals/dp/B07S5F7795/ref=mp_s_a_1_4?crid=2XOU76HS6SRMV&keywords=horse+scratching+post&qid=1648140878&sprefix=%2Caps%2C474&sr=8-4