Metal collars crafted by Herm Sprenger are a symbol of quality, reliability, and security, they are ideal for use in various areas of dog training and everyday life. The high-quality raw material does not cause allergies and does not stain hair, and 100% quality control makes these metal collars for dogs, some of the best collars in the world.
These Herm Sprenger Chrome Plated choke chain dog training collars come in two sizes of wire thickness 3mm and 4mm. All collar measurements include both large end O-rings ( collars are measured from the outer tip of one end O-ring to the outer tip of the other end O-ring) 3mm thickness works for the dogs up to 65-70lbs. 4mm thickness works for the dogs best on dogs over 70 lbs. Please keep in mind that 4mm chains are a lot thicker and heavier than 3mm.