The Herm. Sprenger® Ultra-Plus Prong Dog Training Collar with Latch features a unique, quick release snap that can be operated using only one hand. This training collar is safe, practical and easy to use. The patented center plate construction and symmetrical prong placement provide natural contact for optimal communication. Available in fine, medium, heavy and extra-heavy gauges. Sophisticated production techniques, consistent quality control, superb craftsmanship and the highest quality raw materials make Herm. Sprenger® German chain products superior.Available in 2.25mm x 12", 3.0mm x 16", 3.25mm x 18" and 3.8 mm x 20".