When it is difficult to use a tripod in the car, the car window clamp kit will come in handy. With the window clamp kit, you can move optics quickly and easily. Mount the clamp on the car window and tighten the knob to lock it in place. The ball head can do 360° panning and 90°/75° tilting by controlling the handle. The handle twists to control the friction. The window clamp kit features rubber along the clamp to protect your car window from damage. Included with the WN-01+SW-01 kit is a 50mm Q-R Plate. Features: Clamping range: 0-22mmHeight: 138mm / 5.42 inchesMax load: 5kg / 11.02 lbsWeight: 635g / 1.41 lbs Leofoto Car Window Clamp w/SW-01 Mounting Head Kit WN-01-SW-01