I know this is a really old comment, but it's not that easy. Your work would be upside down. You can mimic the issue with a transfer tool to get a better perspective. A commercial garter bar gives you a groove or a slot past the end of a shoulder that holds the loops to insert the needles into. This homemade bar doesn't have that groove. This homemade garter bar is more of a custom transfer tool until you involve the second one. HeidiMargret here on TH-cam has a better version of this with a shoulder added. It's still a bit tricky, but it does work.
Clever.
Why do you transfer to another garter bar? Couldnt you just turn the one bar around and transfer the stitches back on the needles?
I know this is a really old comment, but it's not that easy. Your work would be upside down. You can mimic the issue with a transfer tool to get a better perspective. A commercial garter bar gives you a groove or a slot past the end of a shoulder that holds the loops to insert the needles into. This homemade bar doesn't have that groove. This homemade garter bar is more of a custom transfer tool until you involve the second one. HeidiMargret here on TH-cam has a better version of this with a shoulder added. It's still a bit tricky, but it does work.