Based on the original Alphalock from 2018, Alphalock Modular locks are even simpler: one moving part and a modular system where Block Locks can be turned into In-Mast Locks by the simple addition of a mast plate, all using one common locking bullet. Meanwhile, the locks have the same strength, equal function, and reliability as the original Alphalocks. As with the original Alphalock program, Modular locks allow full size halyards enabling inshore and offshore locking choices without changing halyard size. Full size halyards with or without locking bullets pass readily through Alphalock products.