I am the inventor and designer of this sharpening jig. This is the original and authentic 4040 Grind Setup Block. 

40-40 Grind Set Up Block - Now easily get the shape popularized by Stuart Batty on your HSS lathe gouges. Sharpen bowl and spindle gouges using your VariGrind 1 or VG2 and this set up block.

The VariGrind 1 shown in the photos is NOT INCLUDED. This offer is for the 4040 setup block and riser. It is a two piece set.

New 4040 Grind Set Up Block for 8" Grinders. Use this with a VariGrind 1 or 2 or similar to get a perfect 40 deg grind on bowl or spindle gouges.
Stuart Batty is an internationally known woodturner who, along with his father Allan Batty, popularized a bowl gouge grind knows as the 40/40 grind. Stuart teaches this grind as a platform only grind that does not use jigs or fixtures other than the platform of a wood lathe tool sharpening system. Until now, the only way to achieve a 40/40 grind was by hand. I have developed a system that uses a gouge holding fixture and a setup block to achieve the traditional 40/40 grind such as the VariGrind 1, VariGrind 2, ProGrind and similar. The results are much more consistent and it is much easier to grind a single facet. The Nose Angle and the Wing Angles will be 40 degrees every time just as one would get with Stuart’s manual grinding method. You may wish to view the video on YouTube to understand more about how it works.