Everything except the actual deadbolt is plastic, painted to look like metal. I can’t possibly imagine it holding up in the long run. 
I could have looked past that, if it actually worked every time, but it doesn’t. Running out the door with two young children, I like to be able to shut the door and be confident that it will auto lock. About every third time, the deadbolt gets “stuck” and will not auto lock. My five year old and I were locked out, because on one occasion when it DID auto lock, it would not unlock. 

The deadbolt I replaced with this was a Schlage keypad. It worked without fail for years, and years. I only replaced it to update the door hardware finish from gold to oil rubbed bronze. After about a week of this dead bolt consistently failing to auto lock, I broke down and ordered a new Schlage keypad deadbolt and have not looked back!!