Steelcore Security Straps are made from Steel Encased Webbing ‘“ heavy duty webbing wrapped around a braided steel cable ‘“ which is significantly harder to clip than steel cable alone. They feature a locking aluminum cam buckle which can be tightened but not loosened, so you can cinch the strap tight around your bag. The Steelcore Locking Straps protects your bag from would-be thieves. It locks the bag to the bike and locks the roll-top closed with a single strap, providing you peace of mind.