This is an Arca-Swiss compatible lens foot with a QD socket for the SONY FE 200-600mm F5.6-6.3 G OSS (SEL200600G) lens. I am selling it due to a system change. The exterior shows some signs of use, but is in good condition without any noticeable scratches. Included accessories are the anti-drop screw (already attached to the main body) and a hex wrench. Thank you for your interest.