80006 Constructo Single Sheave Blocks 5mm (Pk. 20)
Blocks act as pulleys used in conjunction with the miles of line that make up the running rigging. They multiply the force exerted by the crew, enabling yards and sails to propel ships 2000 tons or larger. The more parts a tackle has (rope "legs" between two blocks, determined by the number of sheaves in the blocks), the more the motivating force is multiplied, and the heavier the object which can be moved. Blocks came in many sizes and of one, two, three, even four sheaves. Note: Model blocks do not have scale sheaves. Instead, sheaves are represented by a hole in the block.
Constructo has designed the Single (wooden) Block to be used in the construction of their model ships. These Blocks may also be used for various craft projects. Features: Light tan colored square shaped wooden blocks with one hole. Blocks may be used in conjunction with brass rings, rigging thread (block & tackle) or decorations with ship accessories.