I really like the Tina knives. They seem to keep getting more expensive. After 10 or 15 years, knowing that my interest in growing fruit isn’t fleeting, and being able to afford it, I’ve sprung for the folder and love it. Before that was the fixed blade that also works great but is more dangerous to store and carry around.
That red Victorinox is also a great tool for the price. I’ve had 6 or 7 other single bevel grafting knives but these 3 I’ve settled on.
For me its important to have a straight edge, sharpened on one side, and rigid but reasonably thin. A grafting knife should be significantly sharper than a new box cutter or utility knife blade.
This A.M. Leonard knife is inexpensive and looks like it ticks all of the boxes. I’d expect to sharpen it upon arrival: