Bearing guided cutter for routing the groove for intumescent strips in a frame or door. Suitable for 4mm thick strip with 10mm width. 15mm cut length, 16mm bearing. Tungsten Carbide Tipped. Non stick PTFE coated. Trend 1/4" Intumescent Router Cutter 15 x 24mm. Bearing guided intumescent strip cutter for routing the groove for intumescent strip in a frame or door. To cut recess for intumescent strip 15mm x 4mm Intumescent strip creates an effective barrier to fire and smoke TCT tipped for longer cutting life 1/4" shank cutter 24mm diameter. For either frame or door applications, with standard IntumescentStrip. Neatly cuts grooves on doors or frames to accept IntumescentStrip which...