This set of hooks is entirely made of heavy-duty steel. Each hook can bear a load of 77 lbs. The double-hook structure is more stable than a single one. Combined with a PVC anti-slip coating, it not only holds items firmly but also prevents scratches. Five sizes - two large hooks, two large wave hooks, two small square hooks, two large J hooks and two small J hooks, plus two nylon extension line fixers, to meet the storage needs of different shapes and weights of ladders, gardening tools, bicycles, power tools, etc. It comes with two sets of expansion anchor bolts, black and white. It can be quickly installed on drywall, wooden wall, brick wall and concrete wall with a drill bit and a screwdriver without any additional accessories. The double-hook vertical storage design extends the wall space upwards, making the garage, garden, store, shed or basement clearly visible. It is convenient to access and durable. Material: Alloy.