CMT 663.501.11 Xtreme Spoilboard Surfacing Router Cutter w/Knives 2" x 1" S=1/2"The CMT 663. 501. 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" Cutting Height (I) 1" Total Length (L) 2 1 2" Shank (S) 1 2" Number of Teeth 6 + 3 Product Type Spoilboard Surfacing CNC Insert Cutter with Insert Knives Shank 1 2" Blade Material