Major Mfg A225 Kee Blok supplied keyed different/random. Kee-Blok blocks exiting keys to a lever handle in seconds! Please review compatibility chart prior to ordering. A225 Kee Blok is designed to lock over the larger lever handle locks now manufactured by Falcon, General, Marks, PDQ, Yale and others. Like other Kee Blok models just lock over the lever and existing keys are locked out.