Say good-bye to nail holes around your windows! Home Trends Instant-Up Curtain Rod Holder stays securely in place without drilling or hammering nails through your window frames. No more unsightly holes in your window frames! Sturdy Instant-Up Curtain Rod Holders slip over the corner of your window molding. Attach your curtain rod as you normally would. Instant-Up works on all wooden moldings up to 2 inches wide and 3/4" thick.