SteelFreak Hot Rolled Steel Plates are 5/16 inch thick, weldable, and machineable. Shipped deburred but with mill finish and uncoated, so may require prep work if you intend to coat or paint them. Laser cut to several standard sizes with a tolerance of up to minus (-) 1/8 inch. This means the length and width of each piece can range anywhere from the exact size listed to 1/8 inch smaller, but will not exceed the listed size. Most will be 1/16 inch smaller than the listed length and width. Available in various pack quantities. Made in USA