Product description Flexible Joints Stable Cup Base Strong Alloy Arms How to make the base more stable Better use this cup holder phone mount in a round cup holder and make sure its three feet are on force-balanced. If your cup holder is non-round, try to make sure that its three feet touch the inside of the cup holder when you use it. How to shorten its arm properly Simply align the grooves of the arms at each end of the joint to contract. Come with an Allen Wrench The joints of the holders which have already been manufactured, are sufficiently stable.
If you require even more stability in the joints, we have provided an allen wrench for you to use for adjustment.