Leofoto ST(K) series features a compact carbon fiber tripod and a built-in 30mm rapid lock ballhead controlled by a lever (same built-in as Leofoto SK Series but SK Series controls the ballhead by a knob). The Rapid-Lock System allows for quick adjustments on the fly and the fixed ballhead means fewer parts for compact and stable design. The clamp uses a knob and accepts both Arca-Swiss and Picatinny standards. And the built-in ball head comes with an all-in-one clamp for fast and easy mounting on ARCA Dovetail and Picatinny sections. Leofoto ST Series ST-324C(K) Carbon Fiber Rifle Tripod w/Built-in Lever Control Ball Head ST-324CK