The hardware finishes are grouped in the standard CoronaSelect mtl. There are only 3 groups that change the color of all accessories or its individual parts.

FURNITURE KNOB / PLATE / LINEAR / BRASS collection site: https://www.busterandpunch.com/shop/cabinet-hardware/furniture-knobs/furniture-knob-plate-linear-brass/ 

FURNITURE KNOB / LINEAR / STEEL collection site: https://www.busterandpunch.com/shop/cabinet-hardware/furniture-knobs/furniture-knob-linear-steel/ 

Render Corona 4.0.

The archive includes: materials (mat) textures obj model 3ds Max 2014 and model 3ds Max 2017.

Beautiful renders!