A large 1 metre long bladed t-square for use with a router. blade has two parallel edges to allow a router to run on both edges. Allows a router to rout an edge square. The butt has two m 5 tapped holes for fitting of a false fence. Ideal for grooving, trenching & squaring of material. Made from solid phenolic resin. specification:. Size 1060mm x 300mm x 16mm with 6mm blade. Square tolerance 0.5mm over 1 metre.