Plane/Corrugated Base Professional Wood Worker's Plainer Wooden or Plastic Grip Cast Iron Body Specification Size (Inch.) PLAIN BASE Inner Box (Qty.) Outer Box (Qty.) Size 3 (7") 1 16 Size 4 (8") 1 12 Size 5 (14") 1 10 Size 6 (18") 1 6 Size 7 (22") 1 6 CORRUGATED BASE Size 3 (7") 1 16 Size 4 (8") 1 12 Size 5 (14") 1 10 Size 6 (18") 1 6 Size 7 (22") 1 6