This is not actual steel.This is a plain 8.5x11 inch sheet of the same material we use to produce our line of flexible steel base bottoms. Sheet thickness is 0.025 inch. One side has a peel-n-stick backing, the other side will stick to magnetic surfaces. Magnets will stick to it. The advantage of this product is that this sheet is cuttable with scissors, and has a peel-n-stick adhesive backing.