Wilmar's customers performed facility maintenance, while Barnett sold to locksmiths, retail hardware and contractors. The first professional clockmakers came from the guilds of locksmiths and jewellers. Historically, locksmiths constructed or repaired an entire lock, including its constituent parts. Blanks are typically stocked by locksmiths for duplicating keys. Its members are made up of professional escapologists, restraint collectors, master locksmiths, and historians. The majority of locksmiths also work on any existing door hardware, not just locking mechanisms. Magnetic keys also cannot be reproduced by locksmiths by sight or other "human sensed" information. In 2015 Cutler left Digital Locksmiths, Inc. to found Cyology Labs in Montreal, Quebec. In 1329, in Breslau, a group of brass locksmiths put down their work. In 2000, a device called the "Club Buster" was designed for locksmiths.