Squeezing for the chain is not often necessary, therefore, it is not advisable to buy it, however, it does not always make sense to make a complex design, it is better to follow a simple path in this matter. The simplest design of squeezing a chain is a minimum of labor costs and spent materials.
For crafts, you need a long nut and a bolt or stud with the same thread. In the center of the end face of the bolt, you need to drill a hole and firmly insert a steel tip of a suitable length into it. In the nut you need to make a slot, for this it is easiest to be washed several times with a sander and finalized with a file.
To rotate the bolt, a piece of round timber can be welded in place of the hexagon. Using the craft is simple and if you have the skills to create it, you do not need much time.