The main parts of a block are the shell or body; the sheave or wheel over which the rope runs; the pin on which the sheave turns; the bush or bearing between the sheave and the pin; and the eye, hook, strop or other fitting by which the block is secured in the required position.
Iyantlukwano yebloko liqokobhe lomzimba okanye ihambe phezu kwantambo nganye, isidibanisi apho, ijikelezayo ihlathi phakathi nencam; ntunja, nohako.