The CAMVATE Super Clamp with Knurled 1/4"-20 Mount allows you to secure various devices and accessories to poles and rods. The Super Clamp jaw clamp has a clamping range of 0.6 to 2.1", and it's rubber-padded to prevent twisting and scratching. The jaw clamp features a single 3/8"-16 and three 1/4"-20 threads in different locations. The included Knurled 1/4"-20 Mount, which has a 1/4"-20 screw on the top and bottom, can be mounted onto any of the 1/4"-20 threads to support your device or accessory at the position that best suits your needs. Alternatively, other optional accessories similar to the knurled mount can be attached to the available threads.