MophornV123 Door Lock Hole Opener Kit, Black

Q: where is this Mophorn mortise jig made? Also , how does it compare to the Souber mortise jig?

Based on the hyperlink I previously provided, there seems to be very little difference, except the Souber unit has plastic knobs to hold the shaft guide (instead of eyebolts which can be tightened with leverage instead of only modest finger tightening.

Q: Could this be used to mortise for floating tenons for door construction?

I think these jigs are door specific. I believe they have separate set ups for that. The best place to find out is a YouTube video. Seems to have good answers.

Q: can i purchase additional cutters?

Yes you have to go to the manufacturer site and purchase them

Q: can it be used to mortise hinges?

The lock mortising kit can be used on wooden and aluminum doors with thickness under 13.5 cm (5.3 inch). Suitable for installing hotel doors, security doors and door lock modifying