8-cylinder master-key across two keyway families
Sunday early afternoon at Addison Reserve - 7,200 sqft home with 8 exterior cylinders. Front + back doors on MUL-T-LOCK MT5+ (per HOA spec), the other 6 on standard Schlage F-series.
We designed a master-key hierarchy: a single MT5+ brass key opens both MUL-T-LOCK doors AND each of the 6 Schlage cylinders via an interconnected master pinning system. The owner now carries one brass key for the entire property. 2 hours 15 minutes start to finish.
Master-key design across two keyway families is the kind of work that takes 20 minutes of planning and 20 minutes of execution per cylinder. We bring the pinning calculator to the truck so we design it in front of you and tell you the trade-offs before pinning.
Master-key design + install