Tuff Stuff CL0426T Stainless Steel 26D Entrance Keyed Entry Light Commercial Cylindrical Ball Knob Grade 3 Lock Set Lockset. All Metal Parts. Finish: Stainless Steel. Type: Light Commercial. Grade: 3 - Light Duty. Function: Entry. Keyway: SC1 2 Keys. Adjustable backset 2-3/8" or 2-3/4". 5 pin solid brass cylinder. Rekayable: Will accept the following cylinders: Schlage, Arrow, Marks, AWI, Lori, Falcon, ASSA, and most Medeco. Fits all wood or steel doors from 1-3/8" to 1-3/4" thick. Internal mechanism heavy gauge cold rolled steel. Positive push and turn button locking mechanism. 3" threaded rosette outside. Panic proof mechanism. Concealed mounting screws. push button inside, key outside, Tubular Type Construction, For Use On Interior Or Exterior Wood Or Metal Doors, 1-3/8" To 1-3/4" Thick.