The top external thread is 1/4-20 inches, and the bottom external thread is 1/4-20 inches, supporting 360 degree rotation and used to connection other products 1/4 male to 1/4 male screw connection rod adjustable angles photography bracket is suitable for motion cameras, fill lights, phone clips, tablet clips, and surveillances cameras Aluminum alloy+iron ensures safe daily use, durability, lightweight, compact structure, easy to carry and use, and high stability This is a 1/4 inch male to 1/4 inch male threaded adapter ball clamp manufactured according to international standards, with standard tripod mounting threads Suitable for connecting various 1/4-20 screw holes, suitable for your DSLR camera configuration