This collar can be used not only for training but also as a rugged collar when using a leash. The 3-ring type usually costs around 4000 yen, depending on the manufacturer and material. This item is professional-grade and of unquestionable quality, obtained from an imported dog equipment store that is a regular exhibitor at the Police Dog Association competitions. At the time, I was keeping it at the training center, and when I brought it home, Hachi (my dog) had grown, so I had been storing it. ◾ High-quality stainless steel (SUS) ※ No mixed iron, so a magnet will not stick to it ◾ Collar & Choke (3-ring) ◾ Size 45 (for medium and large dog breeds) ※ Please consider with some leeway, as the measurement is taken from the package. 【How to check the size】 Make a loop slightly smaller than 45cm with a non-stretchy string and use it as a reference for size confirmation. If the size is too tight, gently smooth the fur with your palm and pass it over one ear at a time. A tighter fit will make the choke effect more effective. 【Caution】 ・Not suitable for dog breeds with long fur that can get tangled in the chain. ・Do not use for tethering purposes.