A two-person locksmith team in Bishan, trading as Vincent Locksmith, which says it has more than 20 years' experience. Letterbox lock changes come up most often in reviews, followed by lock replacement, door knob replacement and lock installation. The website also lists main door, office cabinet, gate and room door locksets, and emergency lock opening. Reviewers say the team replies quickly on WhatsApp, sends a quote, arrives on time and keeps them updated. One reviewer was advised to change the handles on a broken metal gate rather than the whole lock set, which was cheaper and quicker. Another had a main gate lockset repaired on the day they called. Prices are described as reasonable. One reviewer says the team ran about 20 minutes behind an earlier appointment but kept them informed. The shop is at 155 Bishan Street 13, and the phone number is 8812 7499.