【Sealed Waterproof Shell】The locks are fully wrapped with a waterproof plastic shell, without dead corners. Waterproof and dustproof to protect the locking mechanism, ideal for use as an outdoor lock. Wear-resistant plastic wrapped shell, can prevent scratches at the same time, durable. 【Multi-layer Superposition Technology】A total of 22 layers of galvanized locks are superimposed, and they are fixed by 8 rivets. After impact, fall, collision and other experiences, it is still intact and can effectively resist violent damage. 【Security Lock Cylinder】The internal structure is precise, and the locking part between the lock beam and the lock body is very thick, which is anti-picking. The inner tank with positive and negative groove structure, 4-pin cylinders in the inner tank increase the density of the transmission ratio and increase the difficulty of cracking. 【2 Pack, 4 Keys】 Size: 40mm, shackle diameter: 7mm. Two packs of fully sealed heavy-duty laminated steel keyed padlocks are