This is a paid asset, but now you can download PBR Themed Key Model Pack for FREE, but please remember this package is provided only for learning purposes or to be able to test before buying the product, NOT FOR COMMERCIAL PURPOSES.
Detail this asset from Unity Store: Original Link
PBR Themed Key Model Pack v1.1
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This Themed Key Model Pack has a selection of 4 PBR metal themed keys (similar to Resident Evil): Heart, Diamond, Spade, Club. Each in two different types, one Gold and one Silver material Suitable for all versions of Unity
Texture resolution: 2048×2048
Type: PBR – Albedo / MetalRough / AO / Normal
Polygons: 500 per key model
INCLUDES
►4 Themed keys
►PBR Metal keys
►Gold & Silver Textures
►Heart, Diamond, Spade, Club themed
►Low Poly Assets
►Fully Prefabed