1、Support 1/4 inch and 3/8 inch equipment installation for more various types extension devices, suitable for professional commercial photographers using. 2、Suitable for clamping on round tube, square object, car window, guardrail, door edge, table edge, etc. Fixture range is about 16-56mm. 3、It can also mount on ball head or soft umbrella connector, which can help lighting engineers and photographers easily lights and other devices on it. 4、Made of quality aluminum alloy, solid, durable and wear-resistant. 5、Anti-slip clamp design, firm and stable, not easy to fall. With rubber inside the clamp, has no damage to the object it is clamped on. Features: Support 1/4 inch and 3/8 inch equipment installation for more various types extension devices, suitable for professional commercial photographers using.  Suitable for clamping on round tube, square object, car window, guardrail, door edge, table edge, etc. Fixture range is about 16-56mm. It can also mount on ball head or soft umbrella connector, which can help lighting engineers and photographers easily lights and other devices on it. Made of quality aluminum alloy, solid, durable and wear-resistant.  Anti-slip clamp design, firm and stable, not easy to fall. With rubber inside the clamp, has no damage to the object it is clamped on. Specification: Model: CL-22 Material: Aluminium Alloy Color: Black Fixture Range: Approx. 16-56mm/ 0.63- 2.20 inch Size: Approx. 9.5x5x 14.5 cm/ 3.74x 1.97x 5.71 inch Weight: Approx. 650g Packing List: 1 x Camera Fixed Clamp 1 x Double-End Screw 1 x Gasket