Got these large hooks to hang a curtain rod with 63 length curtain panels.  Found putting up the hooks a big problem due to no vertical centers and the bottom of the U hook portion was not marked on the back support portion of the hook.  It took longer to hang these than it would have for the holders that came with the rod(but they would leave holes) Also found that the 2 pack of hooks did not contain a spare adhesive strip-so if you mess up goood luck because finding the extra package of adhesive strips was going to require running around to other hardware stores -if they have them(the original store purchased the hooks at did not have extra adhesive strips)  Would use them again but not until the back portion has vertical and horizontal bottom of the U on the hook marked.