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For certain types of training of large or aggressive dogs, a jerky steel chain is often used. Unlike nylon products, they have great strength, but they lack a stopper that prevents the chain from falling off the dog in a free state. This can be very dangerous, as full control over the dog is lost.
To solve this problem, a removable retainer has been developed, which can be installed on any single chain by fixing it in the desired position on the dog. This makes training safer and more effective.

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