Poseidon blocks are constructed from hardcoat anodized Aluminum plates and precision-machined Aluminum sheaves, ensuring high strength and superior performance. The blocks feature roller bearings and ball bearings, which provide smooth rotation and minimize friction under maximum loads. The patented swivel shackle head can be locked in two fixed positions or left free to swivel. For easy maintenance and cleaning, the block can be quickly disassembled with a hex wrench.