This Prime-Line H 3519 casement operator is constructed of a diecast housing and crank handle, with a 8 inch steel arm and a hardened steel worm gear mechanism. It features a square body and mounts on the right side of the window, when viewing the window from the inside looking out. This operator is used on older steel-framed casement windows, with a pair of mounting holes spaced at 3-7/8 inch and another at 4-3/4 inch on center. A crank handle and installation fasteners are included with this casement operator.
This Prime-Line H 3520 casement operator is constructed of a diecast housing and crank handle, with a 9 inch steel arm and a hardened steel worm gear mechanism. It features a square body and mounts on the right side of the window, when viewing the window from the inside looking out. This operator is used on older steel-framed casement windows, with a pair of mounting holes spaced at 3-7/8 inch and another at 4-3/4 inch on center. A crank handle and installation fasteners are included with this casement operator.
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