Ergonomic large main locking knob gives easy handling. Low height profile gives better reliability. Precisely machined ball makes the movement silky smooth. -Laser-engraved scale on the panning base for easy and precise control during panorama shooting.Its with Arca-Swiss style 4-R plate and clamp.Every part is superior quality. Precision engineered for better performance and durability. At Leofoto we know that device is only as good as its weakest part.