This is a standard steel floor plate from a Winchester Model 70 rifle.
Bluing - 90% - There is some minor wear around the edges and joint of the floor plate.
Metal - Overall, this piece is in very good condition. There are minor scratches on the metal across the floor plate, and one significant nick in the metal which can be seen in the listing photos.
We use the NRA Modern Gun Condition Standards Grading System for grading part conditions. You can read about it HERE