Fastening devices and systems and methods thereof. Fastening devices and systems and methods thereof can include a unitary or one-piece body having first and second ends configured and operative to be coupled together or to be coupled to their respective complement in another of said fastening devices. The first end can include a ring or annular portion and a projection that are sized and shaped to fit around an anchor and in an orifice, respectively, of the second end. Fastening devices and systems and methods thereof according to embodiments may be used with items, including footwear, apparel, luggage, a backpack, a bag, a purse, a boxing glove, a punching bag, football or lacrosse shoulder pads, or the like.

The invention relates to a carabiner including a metal body, and a gate rotatably assembled to a first end of the metal body between a closed position and an open position of the carabiner, the gate being in contact with a second end of the metal body when the carabiner is in closed position. The carabiner is provided with a separation bar fastened to the metal body and configured to define two distinct confinement areas. The bar is assembled by clipping onto the metal body at first and second opposite ends of the bar, the first end comprising a first fastener totally surrounding the metal body, and the second end comprising a second fastener totally surrounding the metal body. The separation bar being configured to authorize the opening of the gate when the first and second fasteners surround the metal body.

Fastening devices and systems and methods thereof. Fastening devices and systems and methods thereof can include a unitary or one-piece body having first and second ends configured and operative to be coupled together or to be coupled to their respective complement in another of said fastening devices. The first end can include a ring or annular portion and a projection that are sized and shaped to fit around an anchor and in an orifice, respectively, of the second end. Fastening devices and systems and methods thereof according to embodiments may be used with items, including footwear, apparel, luggage, a backpack, a bag, a purse, a boxing glove, a punching bag, football or lacrosse shoulder pads, or the like.

Fastening devices and systems and methods thereof. Fastening devices and systems and methods thereof can include a unitary or one-piece body having first and second ends configured and operative to be coupled together or to be coupled to their respective complement in another of said fastening devices. The first end can include a ring or annular portion and a projection that are sized and shaped to fit around an anchor and in an orifice, respectively, of the second end. Fastening devices and systems and methods thereof according to embodiments may be used with items, including footwear, apparel, luggage, a backpack, a bag, a purse, a boxing glove, a punching bag, football or lacrosse shoulder pads, or the like.