"The Slik Professional 3-Way Panhead is a heavy duty 3-way pan/tilt head that features a large camera platform with interchangeable 1/4"" and 3/8"" camera mounting screws. Its non-slip cork pad offers a tight, positive camera to tripod mounting solution. It is the ideal instrument for studio use, making the positioning process of a heavy camera a joy. Complete with dual-axis bubble levels, this smooth 3-way head permits quick and easy establishment of vertical and horizontal positions. The ergonomically designed, extra large, extra long handles and knobs assure quick, responsive control of all panhead movement. The oversized space provided under the panhead camera platform allows you to comfortably reach the camera mounting screw to quickly secure the camera"