This Super Knuckle comes with Super Claw (an adjustable jaw) , offering a versatile mounting solution for tube sizes ranging from 13mm to 35mm or flat objects with thicknesses between 5mm and 20mm. The 1/4"-20 male thread at the other end allows you to attach an action camera, a mini light, microphones, and any equipment that comes with a 1/4"-20 female thread.