the back of the box-style head assembly. The friction drive powers large, heavy-walled rollers. The drive roller is easily adjusted to ensure a constant driving force. This is a great way to upgrade an existing Free Standing Jib Crane with motorized power making Get Price JLG Lift Equipment JLG Industries, Inc. is the world's leading designer, manufacturer and marketer of access equipment. The Company's diverse product portfolio includes leading brands such as JLG® mobile elevating work platforms; JLG and SkyTrak® telehandlers; and an array of complementary accessories that increase the versatility and efficiency of these products. Get Price 