The 405 Pro Digital Geared Head was designed specifically to meet the more exacting, time-sensitive needs of busy professional digital photographers who shoot with medium format or 35 mm camera/back with payloads up to 7.5 Kg. It utilizes large, easy-to-grip knobs that provide smooth, positive, geared control through 360° pan and +90° -30° frontal and lateral tilt. In addition to its 3-D geared functions, the 405 also incorporates a unique feature that allows you to instantly disengage the gears and rough position the camera by hand, then instantly reengage them for ultra-precise final alignment. Camera attachment: 1/4" + 3/8" screw. PATENTED