Make your house more energy efficient by insulating old doors and windows.
The CMT Weatherseal bit is the perfect bit to re-groove door and window frames to accommodate wind blocking inserts.
Made of solid tungsten carbide for strength and endurance, these bits reach up to 12mm in depth without the risk of breakage.
Special double-sided design lets you save money by offering two tips in one bit; with the same features as the one-sided weatherseal bit.
Only available with a 3mm (1/8”) cutting diameter.