If your tripod or monopod head lacks a quick release you can convert it by adding the Manfrotto 394 Quick Release Adapter and 410PL RC4 Type Quick Release Plate. To ensure compatibility, both the quick release adapter and RC4 plate come with 1/4-20” and 3/8-16 sized threads on the camera and tripod ends. The quick release adapter also includes a horizontal and vertical bubble level to ensure your camera is always set up accurately