This is a fully mechanical keypad door lock set, powered purely by mechanical structure, no batteries, no wiring needed. The lock allows users to reset the access code easily. You can set your code with 4, 5, 6 or 7 digits by rearranging the red key tumblers and blue keyless tumblers. The package includes lock case, back plate, 60mm standard latch, strike plate, spindles, neoprene seals, wood screws, fixing bolts, tweezers, spare code tumblers and code card. Model 2200 supports removable snib hold-open function, which keeps latch bolt retracted when needed. It fits left-hand or right-hand hung wooden doors, comes with full installation template and instructions. Robust construction for domestic entry, apartment and garden gate use.