They are bolt on holds and they are screw-on holds. Yes, you can use these in either mode allowing you to put these holds anywhere on your wall, not just where you have a tnut. Put these up an arete in line to make the arete more fun.
Each hold in the set is different and varied is style over the length of the holds. They are edges, slopers and pinches.
This set requires 3 x 1.5" bolts, or 9 wood screws.
Shaped by Todd