A metal strip can be obtained during A Void Dance by using a Curious tool on a workbench, when you are in the Black Knight Workshop.
Tyr - The RuneScape Wiki
Isafdar, RuneScape Wiki
All for the Pest - The RuneScape Wiki
Cloth strip - The RuneScape Wiki
Thieving - The RuneScape Wiki
Black Knight guardian, RuneScape Wiki
Sir Amik Varze - The RuneScape Wiki
Chemist - The RuneScape Wiki
Wanted to show some Outdated RS3 models with available or very
Thieving - The RuneScape Wiki
Steel bar - The RuneScape Wiki
Relomia, Emissary of Sliske, RuneScape Wiki
RS PRO Barrier Strip, 28 Contact, 9.5mm Pitch
All for the Pest - The RuneScape Wiki
Rusty anchor cellar key - The RuneScape Wiki