VEVOR Mechanic Stool, 250 LBS Rolling Pneumatic Creeper Garage/Shop Seat, Adjustable Height 22 in-28 in Padded Rolling Workshop Stool with Tool Tray, for Garage, Shop, Auto Repair, Black+Orange

it attached as a compression fitting. meaning once you push it in, and sit once, it's stuck in there good

I actually didn't purchase the one shown. I purchased the one in the photo

Yes it's just slides on and walks in and is very solid

I bought a trifold creeper and am very happy with it. I didn’t buy a stool although the creeper actually folds into a seat.