Grafting chisel

[River's Edge]

This is interesting, does this mean the vertical cut in the host tree is deeper than the horizontal cut, thus requiring 2 different chisels?

It will be deeper further in towards the base of the scion and the angle ensures that the base sits flat even though placed on an angle to contact the cambium of the main cut.

 

[River's Edge]

Are you left or right hand? I am left, want buy one straight chisel and one side edge but I an not sure which? And last but not least according to you for pine 6 or 4 mm will be better? Or you use different size for straight and different for side?

Based on your pictures of chisels, it appears that location and language difficulties may affect communication. Please complete your profile to indicate location and climatic zone. Perhaps pictures would assist the translation?