This Mid-Level Spreader for Select 100/150mm Tripod Legs from Sachtler fits all 100 and 150mm bowls except for flowtech, DA 100 K, DA 150 K, and Cine tripods. It is used when shooting on uneven surfaces such as steps, rocky ground, or slopes. It allows for rapid setup and pulldown by keeping tripod legs at an equal or preset distance relative to each other. It attaches to the center bracket of a tripod and its arms are telescopic to allow for the extension of a tripod leg without detaching the spreader.