Oneida Air Systems says the Universal Dust-Free Router Hood captures nearly all of the dust, chips, and shavings produced by portable routers - allowing for a virtually dust-free routing experience. Made from clear polycarbonate, the router hood features a universal base plate, as well as both an upper dust dome and lower chip cover which fully encapsulate the router bit. The dome and chip cover freely rotate as the router moves - capturing dust from above and below the routed edge simultaneously.