Thanks to early reviewers, We had QC all the locks so the “hard to turn set screw" problem should rarely happen now,buy with confidence5½" Stem shed handle fits storage Shed doors 4½" inch thick or less.T-Handle Lock Kit with Front T-Handle, Back D Handle,4 Keys,2 screws and Allen wrench.Great for outdoor buildings such as storage shed,playhouse and Chicken Coop door etc .3/8-inch drive bit is required to drill the installation hole if it's not for the replacement.Insert the Front T-Handle and adjust back D handle to the thickness of your door with Allen wrench, The D handle latches to the door frame When you twist the front T handle,Turn 90 degrees clockwise to open the then fix the T-handle with 2 Phillips head screws.