Trend TEMP/LB/A Template letterbox Clear plastic template for use with any plunge router to accurately fit three sizes of letter box plates. Made from 8mm thick clear plastic.Use on wooden doors up to 50mm thick. Use with 1/2 inch collet plunge router. Requires 12mm cutter and 30mm guide bush. A Unibase may be required for certain makes and models of router.Router not included.Specification-Template size=326 mm x 290 mm x 8 mmLetterbox plate sizes220 mm x 50 mm210 mm x 60 mm200 mm x 60 mm