Top-of-the-Line Model Featuring Premium SUS316 Stainless Steel This is the top-of-the-line model using a premium stainless steel chain. It uses SUS316 stainless steel, which is highly resistant to corrosion even in seawater. You will be completely satisfied with the quality once you hold it in your hands. The smooth texture that feels comfortable against the skin despite being metal, and the substantial weight, are unique features of this Pro Series. Chrome Stainless Steel Chain with Master Lock The chain is 50cm long! Description This is an adult male collar made with high-quality SUS316 stainless steel link chain. It is perfect for those who want to clearly express the roles of master and livestock. It is finished with a keyed Master Padlock. Important Notes Adult Male Collar [For Large Dogs] This is a collar, not a necklace. Comfort is not considered; it only serves as a restraint. The total weight is approximately 430g, giving it a significant presence. It is designed to be tight enough to prevent removal over the head. If you lose the key, you will not be able to remove it. The chain is made of hard stainless steel. It uses a 6mm wide stainless steel chain. The lock also uses a high-quality cylinder lock. The administrator should be careful not to lose the key. The administrator should not lend the key. * Returns due to incorrect size are not accepted. Please be sure to measure your neck circumference before purchasing.