This is a jalousie operator in a bronze finish that is diecast construction. Used on Daryl Windows as well as a variety of other manufacturers. The 4-1/4 inch link arm has an offset at the end. Mounting holes are 4-3/4 inch or 3-7/8 inch on centre. It is a reversible, non-handed design that can be used on either left or right-handed installations. Matching T-handle is included and easily fits on the 5/16 inch spindle.