The Herm. Sprenger Micro-Plus Prong Dog Training Collar with Center-Plate & Assembly Chain with Swivel - Black Stainless is the ideal training tool for smaller dog breeds. This collar combines durability and functionality, featuring a 1.5mm wire gauge and a center-plate assembly chain with a swivel ring for added flexibility and comfort. Designed to fit neck measurements up to 10 inches, this collar ensures effective training without the need for additional prongs.