The Skyjack 4740 is a model of scissor lift manufactured by Skyjack Inc., a company specializing in the production of aerial work platforms and material handling equipment. The Skyjack SJIII4740is part of the compact electric scissor lift series, designed for various indoor and outdoor applications that require elevated access. The Skyjack SJIII 4740 has a platform height of 40′ and a working height of 46′. They are 47″ wide and have the 3′ slide out deck extension. These are preferred in Amazon Warehouses all over the USA.