This is the same twist snap that Parelli sells for twice the price. It is solid brass and measures 4 1/4" long and the eye measures about 1 1/8" in diameter. This one has the hinged side so you can open it for easy use. They sometimes call this a panic snap but it is NOT. A panic snap has a quick release so they your horse is able to get loose. This is the twist snap that you twist to release. You can use it to make a lead or lunge line or to replace a broken clip on one you already have.