Prime-Line H 3960 Casement Folding Crank Handle, 2-3/4 In. Width, Die Cast Zinc, Bronze Finish (Single Pack)

Folding arm is constructed from diecast zinc metal to reduce projection distance and interference with window coverings | Universal fit with set screw and plastic inserts which are 11/32, 5/16, 3/8, 9/32 inches all with 12 ridges and a 3/8 inch with 11 ridges | Align the adapter with the set screw on the handle and pass the screw through the hole and set directly on metal spindle shaft to hold in place | Ensure your operator has been thoroughly cleaned and lubricated and the ridges are not worn for optimal performance, a tight fit is best | Note- Please compare the line art drawing and compare with the spindle you have before purchasing