This is a left-handed casement or projecting window locking handle. The heavy bronze casting has a 13/32 in. hole in the base that the screw and clevis fit into (see H 3658). the latch part stands 3/32 in. from the surface it comes in contact with. This is used on Old Style Fenestra Windows. For other similar styles for Fenestra see the related items. For right-hand see Prime-Line part H 3650.