The TM2, 1602 Trimark Key is a type of key blank that is commonly used by locksmiths and key cutting professionals. It is a versatile key blank that can be cross-referenced with several other part numbers and manufacturers, including Ilco, Ilco EZ, Jet, and Original. This key blank is suitable for a variety of applications, including residential, commercial, and automotive locks. It is a reliable and durable option for those in the locksmith and key cutting industries.