Although weighing in at only 680g the precision engineered arca swiss monoball z1 sp single pan with quickset classic can support a load of up to 60kg the single knob quickset operation makes locating and secure setting of the plate which is available separately quick and easyplease note the safety stop feature of the wimberley plates do not work with the new double decker arca swiss quick release clamps on the z1 head the wimberley plates can still be used but users must ensure tha