Application This set of 3 clamps with built-in screws allow for easy adjustment of bed frames and supports. These clamps feature an L shaped handle for the tightening screw in order to facilitate easy clamp application. Note on Measuring Most of the time, this type of clamp will be clamping 2 angled steel rails together. Your clamp will need to be just a little bigger than your angled steel rails as measured from the outside point of one side of the V to the other. Please see the Approximate Dimensions picture under "More Views".