CMT 663.014.11 Spoilboard Surfacing Router Cutters w/Insert Knives 2-3/8"The CMT 663. 014. 11 is a Spoilboard Surfacing CNC Insert Cutter with Insert Knives. CMT CNC insert cutters for spoilboard surfacing and V groove routing. Uses replaceable 4 sided carbide insert knives for economical, long life CNC surfacing. SPECIFICATIONS Diameter (D) 2 3 8" Cutting Height (I) 15 32" Total Length (L) 3 5 32" Shank (S) 1 2" Number of Teeth 3 Product Type Spoilboard Surfacing CNC Insert Cutter with Insert Knives Shank 1 4" Blade