Products Categories Mechanical Products Locks Mechanical Door Locks Locksets Yale Locksets Yale Locksets offer protection and convenience for your business, home and your family. Yale Commercial Key in Knob Lockset – YK16/YK17Standard "PD" type cylinder keyed to C4 profile. Yale Commercial Key in Lever Lockset – YL16/YL17Standard "PD" type cylinder keyed to C4 profile. Yale Residential Key in Knob Lockset - BallStandard Yale profile keying. Yale Residential Key in Knob Lockset - BellStandard Yale profile keying. Yale Residential Key in Lever Lockset - YL1Standard Yale profile keying. Yale Residential Key in Lever Lockset - YL2Standard Yale profile keying.