UPGRADE SAFETY DESIGN - Now with silicone gaskets instead of felt for the perfect hold, increased friction by five times, crib mobile arm can be firmly fixed on the baby crib, no longer shake. For the sharp edges of the arm, we polished the crib mobile arm, no sharp edges protect your baby stays safe. Made out of 100% beech wood, A natural and cute addition to any baby nursery..UPGRADE Stylish DESIGN - 360° adjustable, 3 height settings to meet different baby crib, the adjustable mobile arm allows you to centre the mobile over your baby or move it. Hidden metal screws are used in the mid-end for docking, instead of traditional wooden holes are used for docking, which is more stable. You can stably hang your baby's favorite decorations, no more plastic for a soft and sweet soothing experience..INCLUDED MOBILE ATTACHMENT - This crib mobile arm comes as available for DIY decorate to use set. It includes the matching cross design mobile holder to attach your favorite DIY mobiles, designed with hanging holes on the crib mobile attachment, so it can be used to hang bell, colored ribbons, shell, nursery toy or little plush doll with strings, bring much fun for your baby after hanging decorations..EASY TO ASSEMBLE - Just place the mobile arm between the crib bars and screw the closing disks tight.Assembly time 1-2 minutes. When not in use you can take them apart for compact storage. Its lightweight and high-quality design make it easy to assemble and install in your baby's crib..ATTENTION - This wooden crib mobile arm works with MOST cribs, there must be bars and a flat surface for the crib mobile arm to attach to, fit the thickness of the railing (0.2 - 1.2 inches) and the distance between the railings (0.59 - 2.56 inches) of the crib, NO fit fabric crib, baby cradle. We are committed to producing high-quality products for every baby. We will solve any product problems for you at any time. Finally, Goodnight BABY!