3-Tier Adjustable Shower Caddy XL in Stainless Steel and Anodized Aluminum

A:  Yes, this can be used on a standard 1" shower head.

A:  Yes, the extensions can be removed.

A:  There are knobs on the back that you turn. You can slide the shelves up or down and then tighten the knob.

A:  there is knob on the back of the rail that is used to loosen and tighten the rails/shelves. once loose they are free to move, also the entire rail is length adjustable (telescopic).

A:  no adjusting for me.

A:  I didn't. It was usable right out of the box.

A:  Just simple rotating buttons that tighten/loosen. You can move the shelves up and down, and also remove them completely if you want to swap their location.

A:  Dials on the back to adjust the shelves.

A:  no adjustments.

A:  no

A:  You can adjust the shelves by moving them up and down.

A:  They slide up or down the center bar and lock into position.

A:  Yes, this unit is rust-proof.

A:  I don't know. I've gotten shower items before and after about a year the rust began to appear.

A:  Looks like it. The wire parts are stainless steel and the body is aluminum with bits of plastic.

A:  The manufacturer states it is. I've had mine in action for 2-weeks. Time will tell.

A:  Hello NFV, All of our shower caddies are rustproof and are backed by our excellent 5-year warranty. Warm regards, simplehuman