Andersen single sash lock (left hand) with screws - metal lock works with perma-shield improved/e-z casement and awning windows manufactured from 1999 to present. This lock fits shorter casement units (c2, c25, c3, c35) with an outside unit height less than or equal 40 13/16". Sash lock is metal and will not replace older style black plastic sash locks. Sash lock is for a left hand unit. A left hand unit will have the sash lock on the left side as viewed from the interior of your home. Left hand sash lock shown in photo in open position. Note: awning windows require a left side and right side sash lock. This sash lock fits on the left side as view from the interior of your home.