Coastal Pet Titan Snap-On pinch training dog collar is an effective training device when worn under supervision as it distributes correction pressure evenly around pet’s neck. Argon welded and chrome plated for maximum strength and durability. This collar easily adjusts for a proper fit by simply adding or removing links. This process produces smooth links that much stronger than electric welded chain. This training collar has 4.0-mm diameter links with an overall 22-inch collar length.