This bit was purchased from DK Tools and the delivery was very quick. This Amana nozzle is of very good quality and I have not found any other manufacturer that makes this angle.
This product is made in Israel. I used it to make some large wooden sleepers in my old house. I used 3/4" red oak and the chisel was able to do it in one pass and worked very slowly.
I find this accessory useful when working with edges on curved or musical drums. Clean, precise cuts without vibration and long sharp edges. This is a must have for custom drum builders who need a 30 degree edge. I slice the clams to about 1/2 inch thick, leaving room.