These quick click hooks are an all metal tough design. Our hooks are made from a strong but lightweight aluminum which is then hard anodized black. The button is made from tool steel and gold zinc plated for great wear resistance. They are tested to 100lbs load! They are nice and smooth with radiused edges so they won't cut into your soft bag handles. Also there are no welds to break or sharp edges or cheap wire metal to bend. If you don't need to use your hook, simply un-click it. The hook can accommodate wide handles or multiple bags ropes, tiedowns etc. The opening is 1 inch or 25mm.