Magnetic Quick Connect: Thislatch connector has a strong magnetic force to securely hold the leash and collar together. You can also release the clasp easily (once you get familiar with it).
It is strong enough to fit any heavy dogs ( I have a black lab and it controls him perfectly. The hook latch will be compatible to any dog collar.
Convenient to Use: harness latch quickly connect leash to the collar without much of a hassle. It's great for blind or anyone with hand, finger problems.