Antal realizes special blocks for maneuvers like clew hauling, reefing and halyard hoisting. The frame of these blocks is designed to make sail handling safe. In the case of clew blocks and reefing blocks mounting on the sail is with webbings, which reduces point loading of maneuvers on the sail. Twin halyard blocks, instead, have an extremely reduced size and are thus very suitable for halyard 2 to 1 tackles.