Replace a cracked, scratched, or otherwise damaged interior protective lens on your DEWALT DXMF21011 Welding Helmet with one from this 5-piece multi-pack of this manufacturer certified replacements. Made to the same specs as the factory original lens, these replacements are constructed of the same durable polycarbonate plastic to stand up to the same level of punishment. These slim protective lens covers protect the inner surface of the electronic auto-darkening filter and help prolong the life of the more delicate component. Measuring 1mm thick these lenses are impact resistant and will not shatter when dropped or struck.