1、Made of high grade aluminum alloy material, which is solid, firm and durable 2、Anti-skid design at the articulating part increases the friction, making it be more tight and secure, to reduce scratch caused by friction at the same time 3、Provide both 1/4" and 3/8" screws 4、Offers super clamping strength and stability 5、Big load of up to 2kg with mini dimensions Features: Made of high grade aluminum alloy material, which is solid, firm and durable. Anti-skid design at the articulating part increases the friction, making it be more tight and secure, to reduce scratch caused by friction at the same time. Provide both 1/4" and 3/8" screws. Offers super clamping strength and stability. Big load of up to 2kg with mini dimensions. Great accessory for camera and DSLR equipment. Specification: Material: Aluminum Alloy Thread: one 1/4"-20 and one 3/8" Minimum opening diameter :10mm Maximum opening diameter: 41mm Package Include: 1x Crab Pliers Clip