A toy lead is also known as a string lead and is meant for breeds under 6 pounds. The toy lead thickness is 1/8" with a length of about 4'. This used as an all-in-one-type lead with a neck loop, a bead to slide down to tighten around the neck, and a swivel so the lead will not twist up if the dog turns. Unless specified in the special instructions box, the swivel and neck bead will be silver.
The martingale strap make it more secure type lead, particularly for puppies who might try to back out of the lead. The strap will match the cord color. The martingale strap is about 8" long.