Automatic magic dog leash, Magic latch Tied on Dog Collar Leash Connector, Dog Collar Latch Key, Dog Leash Fastener Magic latch has One Touch Release & Clasp make the clasp and your dog leash attach fast and easily Secure 300 lb static weight strength The Magic Latch is universal and is recommended for dogs up to 85 pounds Extra collar rings included (2 sizes). Not for use with tie-outs. A fantastic stuff that be helpful when you glove in Winter, or too many shopping bags in your hand etc. Cool and Convenient to your life!