2 level clamp
the bolted clamp has a spacer in the center to prevent the bolt from squeezing on the seat post, it just holds the seat to the clamp
the lever clamp holds the clamp to the seat post.
I'm guessing this allows yo to remove the seat but not the seat post without tools. Not really a theft deterrent.
It won't let you adjust the height of the seat.
the bolted clamp has a spacer in the center to prevent the bolt from squeezing on the seat post, it just holds the seat to the clamp
the lever clamp holds the clamp to the seat post.
I'm guessing this allows yo to remove the seat but not the seat post without tools. Not really a theft deterrent.
It won't let you adjust the height of the seat.