If you're looking for a solid, secure way to attach your Cell Phone or Smart Phone, Camera to your Tree Stand, Boat, or just about anywhere, check this out! You've tried the cheap mounts and found out that they simply don't stay put? So have we! The Hornet Smart Phone Mount comes complete with a SOLID Crab Clamp that can attach to any square, round, or oval tube up to 1 1/4" diameter. (tool less installation) The Crab Clamp base attaches to the Hornet Quick-Adjust arm. Unlike the friction adjustments used on most camera mounts, this unique arm has a unique mechanical design where a simple twist of the elbow knob loosens the entire arms AND both ball sockets on the ends so you just loosen, adjust to the desired position, and lock it in place with a simple half turn of the knob. The phone holder attaches via standard SAE 1/4" thread. You can also attach an Action Camera or other POV action camera that has a 1/4" threaded base.