Knob Lock CB03 : Storeroom Function : Heavy Duty Grade 2 : Uses Schlage Lock Key Way : By Faultless WILL AUTOMATICALLY KEEP YOUR DOORS SECURELY LOCKED! - Just close the door and rest assured with its automatic exterior locking while leaving interior knob unlocked EASY RETRO FITTING FOR PREVIOUS DOOR PREPS - Drilling New Holes NOT Necessary INDUSTRY TRUSTED SCHLAGE KEYWAY PROFILE - Has 6-Pin Key In Knob Cylinder & X2 Backsets TOUGH STAINLESS STEEL FINISH PROVEN TO LAST - Verified Up To 400,000 Cycles & Withstands At Least 150lbs. Of Force, Heavy Duty Cylindrical ANSI Commercial Grade 2 Steel Knob Lock COMPLETE 12-MONTH WARRANTY: We Know Youll Love The Extra Peace Of Mind Your Lock Brings, Thats Why Its Backed With A 1-Year Manufacturer Hardware Warranty & Lifetime Finish Guarantee