Trend Professional Intumescent Strip Router Cutters Guided Intumescent Cutter - 15mm x 40mm Ref: 348X1/2TC Key Features: Bearing guided intumescent strip cutter for routing the groove for intumescent strip in a frame or door A range of sizes available to suit 4mm thick strip from 10mm to 25mm width Intumescent strip is used to create an effective barrier to both fire and smoke Choose alternative bearings to suit other thicknesses of intumescent strip Specification: D: 40 mm (metric diameter) C: 15 mm (metric cut length) B: 32 mm (metric bearing diameter) E: 4 mm OL: 70 mm (overall length) L: 41 mm Shank Diameter: 1/2 inch Fire check: 45 minutes