Elongated links are more kind to the dog's coat. Sophisticated production techniques, consistent quality control, superb craftsmanship and the highest quality raw materials make Herm. Sprenger German chain products superior. Herm. Sprenger offers a variety of high-quality, specialty chain products. 4.0mm links Fits necks 14 to 27 inches Safe, effective dog training tools with proper use. Made of high quality metal