WEATHERSEAL ROUTER BITS 712.030/040-812.032 With CMT router bits make your house more energy efficient by insulating old doors and windows. CMT Weatherseal router bits are the perfect router bits to re-groove door and window frames to accommodate wind blocking inserts. Made of umpinainen carbide for strength and endurance. Special economical double-sided design lets you save money by offering two tips in one router bit; with the same features as the one-sided weatherseal router bits.
