Carbide 1 1/4″ bore with 1″ bushings. These are actually used to make house doors up to 1 5/8″ thick, but when you lower them on your shaper you can use them with 7/8″ or 13/16 stock to make frames for cabinet doors. I use these in my own cabinet shop with excellent results. Set so you have 3/8 showing on face of door, and you end up with a unique pattern on both the front and back of the door. These are a quality product made in Japan. Not a cheaply made piece of China junk. The item “Delta/Rockwell carbide shaper cutter set #43-021 full set of bits NOS” is in sale since Saturday, February 2, 2019. The seller is “mickicarte0″ and is located in Galatia, Illinois. This item can be shipped to United States.