RuneScape Classic Wiki
RuneScape Classic Wiki
The main RuneScape Wiki has an article on: Adamantite Kite Shield
The Old School RuneScape Wiki also has an article on Adamantite Kite Shield.

The Adamantite Kite Shield is a shield which requires level 30 Defense to equip. It can be made from three adamantite bars by players with level 82 Smithing, yielding 187.5 experience.