Trend C223X1/2TC Intumescent Cutter Set 20mm x 40mm by Amazon.co.uk

• Cuts the perfect sized slot into door edges and door frames for fast, perfectly flush fitting of intumescent strip.

• Bearing guide ensures the correct 4mm depth and 20mm width is always achieved to meet Fire Regulations.

• 1/2in shank, for heavy duty work with bigger routers. Position of groove can be altered with the router plunge for correct setting for 60 minutes fire and smoke protection.

• PTFE coating to minimise heat and resin build up for increased cutter performance and longevity.

• 1/2in shank for use in bigger routers and heavier applications with 'K'mark shank to ensure safe working practices.