RAM UNIVERSAL CLAMP & Standard 3inch arm with CAMERA STUD MOUNTING BASE for SPOTTING SCOPES RAP-B-121B-202A (SKU 6413)Universal Clamp Mount consists of the strong and light weight RAP B 121BU clamping base, Standard 3' plastic arm RAP B 201 and the RAM B 202A 2. 5' dia Round Camera Base with 1 4' 20 Stud. The which is perfect for numerous electronic devices including cameras. Modular in design, switch out the clamps for a perfect fit no matter what the mounting surface, or add a second ball to mount another device; brilliant. Crafted to hold firm to most glare