Manfrotto 468MGRC4 Hydrostatic Ball Head with RC4 Rapid Connect System (3271) Ball-locking system with RC4 Rapid Connect Plate; ideal for larger-based medium-and large-format cameras allows you enough room for long heavy lenses Hydraulics create super-tight lock from a minimal turn of the locking knob Lightweight, but supports heavy camera loads up to 35 pounds Independent pan and tilt locks with a 360-degree pan and +90 to -90 degree tilt Oversized ball-locking knob for easy control even when using gloves