I've seen pictures of these, but I've never seen one in person. These benches are rectangular and seem to have a knob on the side to adjust the seat height. I'd guess it's some kind of cam or scissor jack inside?
I've seen pictures of these, but I've never seen one in person. These benches are rectangular and seem to have a knob on the side to adjust the seat height. I'd guess it's some kind of cam or scissor jack inside?