I found standard capos to be a little fussy with my 12 string guitar, I was getting unwanted buzz and it was a struggle to fit the capo without bending strings out of place.
For me, this capo was the perfect solution. It’s notched surface eliminated all of the issues I was having.
The capo is well-made, robust and easy to use.
This capo was a perfect fit for my Danelectro, but if you play a different variety of 12 string I’d recommend you check to see if the grooves line up with your strings, some 12s are strung high-low where others are strung low-high, this could make a difference. Also, it might not be the right fit if your 12 string has a notably wider fretboard to accommodate the extra strings.