Using the Bessey ST290 telescopic drywall support is easy. First, decide on the length you need. You can do a rough pre - setting by adjusting the telescoping and quickly locking inner pipe. Then, hold the foam grip and turn the support to do the final clamping. This support can be used on flat surfaces and slopes. When using on slopes, make sure the swivelable contact surfaces are properly adjusted between - 45° to + 45°. As for safety, always check the locking of the release button before applying any load. The maximum load capacity is 150 kg, but this depends on the size of the support and the length applied. To maintain the support, keep it clean from dirt and debris. If it gets wet, dry it thoroughly to prevent rusting of the steel pipes. Regularly check the rubber PVC contact surfaces for any signs of wear and tear.