The Brady Lightwriter is a complete, self-contained industrial fiber laser workstation. It is used to etch or engrave permanent text or serial numbers etc. on tools, tags, or metal. It will provide hi... The Brady Lightwriter is a complete, self-contained industrial fiber laser workstation. It is used to etch or engrave permanent text or serial numbers etc. on tools, tags, or metal. It will provide high-contrast marks that do not wear off.