Because this kind of tool is different from the various engraving tools that we commonly use an alloy handle material to directly grind out the work, it is welded with various shapes of knives under the ∮6 handle through a special welding process. The head is directly used for the engraving of various special shapes, so it is also called a big head knife.

W1: The diameter of the big-end knife under the handle, which is randomly matched to 32mm; there are also smaller ones for cutting

Cut small three-dimensional characters.

A: Half of the included angle between the two sides of the tip of the tool, because the random tool is a 90° tool, then A is set to 45 (similar to a flat-bottomed tipped knife)

W2: The width of the tool nose, because when calculating the three-dimensional path, the path requirement is to walk with one knife, which has no meaning. Usually, it can be set to 0.1 or 0.2.

Tool use: three-dimensional clear angle characters (using the “3D” function to calculate the path) and the chamfered edge of the back carved crystal card.