Compatible with Prime-Line part C 1131 mortise style handle set Replaces broken or worn latch (for patio sliding door) and includes diecast 1/2 inch diameter centering ring Steel-constructed, zinc-plated tailpiece is 3/4 inch overall length This tailpiece is 15/64 inch wide, 3/32 inch thick and 3/4 inch length that will fit mortise latch keyway slot of 3/32 inch thick and 1/4 inch long Please refer to the line art drawing and compare with your original item before purchasing