The GeoMeasure Data Collector Cradle is designed to securely hold your data collector, without risking damaging your equipment. The included screw clamp allows you to adjust the tightness exactly to the point that will securely hold your data collector in place without damaging your pole. There is no need to worry about someone knocking the pole and having the clamp release and drop your data collector. It will always hold the data collector in the exact position you need it. The cradle is also designed to perfectly hold a Hemisphere CW400. The clamp is designed to snugly hold the data collector without having to risk pinching the data collector to tightly. The cradle is engineered to perfectly hold the data collector, without risking damage to your data collector.