Environmentally friendly, inexpensive but much less effective than CLASS1 CAPI. We must make a choice.

What attracted me was the price and the comments from other buyers. After testing, these archives clips are much less effective than CAPI Class 1 that are 3-4 times more expensive !!!
If you have few leaves to assemble they are perfect if you have a larger set of plastic wallets legs slip fault with prongs to hold them. In addition we must drag them under the small clamping legs on the same side, which a priori, is simpler, but in fact much less effective than anti-parallel system. Sometimes it makes crazy, because you do not have the space to pass the fingers but it's foolproof, no risk of dropping out.
Conclusion: If you want to archive paper plastic bags, I do not recommend them beyond twenty covers for sheets of paper you can go a little further, it slips less. Then in their box archiving and not too much handling. If you want to archive an entire workbook plastic bags, only one solution: invest and be less green. There you can handle them without having to recover the ground and bitching like crazy.
I recommend for small budget and small batch of leaves, for the most ambitious or demanding, not really. Unless you store them in a box to archive and no longer touch them.