This is the greatest idea ever!
I found these while searching on Pinterest. I bought enough for three windows just to test them out. After I hung my curtains in less then 10 mins, ...

Passed

Independent

Testing

Practical Use Test….
PASSED
Supports 10 lbs. Test….
PASSED
Durability / Stability Test….
PASSED
SLIDE ON CURTAIN BRACKETS PASSED INDEPENDENT TESTING PERFORMED BY CONSUMER TESTING LABORATORIES
REPORT No. ARHL0172304
Consumer Testing Laboratories is a very reputable testing company used by the world’s largest retail store.
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       Slide On Curtain Brackets
Reviewed By Tammy Jo Schoppet
Founder of Rental Decorating Digest

"Great idea, great product...
perfect for every renter!" 
Description:
Big ideas, come in small packages! I first heard about Slide on Brackets from a friend via email and knew (if it really worked) it could be the perfect solution for renters who want to add quick style to their windows. To be perfectly honest, I am usually skeptical about "As Seen on TV" type products, but this one I had to try and found it was a hidden gem!  

The Test: 
When I tried this product I was thrilled by how easy it was to simply replace the bracket and hang the rod. You can hang just a valance or valance with curtains, and the product claims to hold up to 10 lbs. worth of material.  
Read Full Review at (http://www.rentaldecorating.com/reviews/review-slideonbrackets.htm)