Adjustable Wall Bracket, Curtain Rod Brackets Set, Ruesious 3Pcs Adjustable Heavy Duty Metal Curtain Pole Holder

Could confirm if the curtain pole brackets are for 1 inch curtain pole or 30mm. As your content description differs from your heading.

What size drill bit do i need for the rawlplugs and screws that come with them

That screw to adjust the length, can be opened and reverse? Anyone pleaseeee

What type of metal are they? I'm looking for brackets to match a satin steel curtain pole. Thank you.