Our Steel Defender 10x13.5 Ballistic Body Armor Plates are manufactured specifically for us from 1/4" thick 500 Brinell hardness armor plate steel which exhibits high-hardness and are certified NIJ Threat Level III. 500 Brinell hardness armor plate steel is used to stop high velocity projectiles, i.e., bullets. This armor steel plate is particularly useful in protecting against blunt trauma, knives and firearms. The N.I.J threat level is determined by 3 factors – the size of the round that the product is meant to defend, the speed at which that round is traveling, and the distance the round will travel before reaching the target.
Steel Defender steel is quenched and tempered at very high temperatures to sustain a tough surface for the best levels of protection.