The phrase "steel exterior" means that the outside of something is made of the strong metal called steel.
Sentences with «steel exterior»
The stainless steel exterior helps to lock in freshness and keep everything the way it was when you picked it up from the brewery. (geekwrapped.com)
The stainless - steel exterior trim is in great condition, and the running boards and rear wheel wells have been mildly customized. (barrett-jackson.com)
The density of this material or its specific gravity is just 20 % that of a comparable steel exterior skin, yet it is just as rigid and strong. (topspeed.com)