Greater Locksmith is Licensed, Bonded and Insured. Business mailing address in Whitby: 1032 Brock St. S. Whitby, ON L1N 4L8.Main office at: 3337 Bathurst St. Unit 2, Toronto ON M6A 2B7.This address is where we receive our mail, our retail store is located at: 3337 Bathurst St. Unit 2, Toronto ON M6A 2B7.