Once in a while our durable UHMW blocks might break during a hurricane or high wind storm or some people will make the mistake of installing one of our PWC docks or Floating Boat Lifts in a very rough water area. The result may be a breaking block. our UHMW blocks are very durable and long lasting but we do get a request for a “Superman” block that is basicly unbreakable. These items are special request only. The heavy winds and rough water will not harm our Jet Ski Floats or our Boat Lift Ports but the blocks and bolts might snap if the right high wind storm hits in open waters. These blocks are made of solid steel and are hot dipped galvanized. These work great on our watercraft docks and drive on docks.