To produce a universal key, you will need available materials: a profile pipe, a bicycle chain and a piece of plastic pipe. With this home-made device, you can quickly unscrew the large-diameter metal nuts, plastic threaded connections, and even oil filters in the car.
In general, the thing is really useful, and you can make a universal key in literally 30-40 minutes. Of the basic tools for work, a angle grinder with a cutting and flap discs, a welding machine (preferably an inverter), as well as a gas torch or a building hair dryer are required.
The main stages of work
From the profile pipe 20x20 mm, it is necessary to cut off "shorty" with a length of about 10 cm. If necessary, we clean the workpiece from rust and remove burrs. Also, to make a homemade universal key, you will need a piece of a bicycle chain and a small piece of polypropylene pipe. Moreover, it is desirable that the pipe was unreinforced.
Cut off a piece of the bicycle chain of the desired length and weld it to the profile. In a plastic pipe you need to make a small groove. Then we heat the profile with a burner and insert it into a plastic pipe.
If there is no gas burner at hand, then in this case you can heat a piece of plastic tube with a construction hairdryer. We clean plastic "snot" with the help of a grinder. The result is a universal key from a chain and a profile pipe, which is definitely useful in the household.
The detailed key manufacturing process, as well as options for its use, can be seen in the video on the site.
