The KS-40 Low Gravity QR Ball Head with Panning Arca-Type Plate from Sirui has a load capacity of 55 lb and is precision machined from durable aluminum alloy. It is designed to lower the center of gravity for more stable movement and enhanced locking force. It features adjustable friction control to hold even heavy equipment stable. It has a panoramic base with a numbered scale and independent locking knob. Double notches make it simple to change camera orientation from horizontal to vertical.

The KS-40 incorporates an Arca-type quick release set with a quick release flip-lock system to mount or remove equipment. The large flip-lock lever offers rapid one-handed operation. The included KS-55P panning Arca-type plate allows 360° camera rotation regardless of head position or if the head's panning base is locked.