A locksmith in Bishan at 155 Bishan Street 13, which reviewers use mainly for letterbox problems, lock changes and door knob replacements. Other work mentioned includes lock repair, lock alignment, letterbox unlocking and digital lock installation. Reviewers mention fast response most often. One customer says a locksmith arrived within 30 minutes and opened the door in a couple of minutes, at reasonable prices. Another had a digital lock that would not open because its battery was weak, and was told how to open it without a callout. A third says a technician arrived on time and fixed a main door lock and a balcony lock. Within a kilometre there is one other locksmith, Singapore Locksmith, 0.0 km away, which has 2,370 reviews and rates 4.6. Of the two locksmiths with ten or more reviews, neither rates higher than this one.