BESSEY STE provides the support you are looking for.   

The single hand operation allows you to adjust the height  with a twist of the wrist or push of the button.

The robust design allows for higher load capacities.

Features

• Single hand operation 2-component plastic handle with pump mechanism keeps one hand free. 
• Extremely secure hold Robust design allows for higher load capacities. PVC pads on top and bottom grab the surface for safe support.
• Quick release button allows for fast retraction Quick-slide button for rapid extension and retraction of the telescopic bar.
• Heavy duty durable steel construction Steel tube construction allows for higher load capacities.
• Capable of 45° Support  Continuously swiveling contact pads from -45° to +45°. Screw holes for additional support.