GMP's 10553 is a heavy-duty Multiple Sheave Cable Block used to simultaneously support three cables prior to lashing to a supporting suspension strand.
The three sheave multiple cable block can keep up to three 2 1/2 in. (63mm) diameter or smaller cables separate until you’re ready for lashing to the messenger and is ideal for triplexing cables in the electrical industry; that is lashing up to three 750 MCM cables together to a supporting strand.
The 10553 features a heat-treated aluminum alloy frame and sheave, with Oilite bearings on the sheave and steel inserts on the strand hooks for easier movement. A bi-directional lever-operated cam locks the block in place during pulling in, then automatically releases it during lashing.