If the code on your TriMark lock or key starts with TM and the number is between 151 and 200, this is your key. This band is cut on a different blank from TM101-TM150, so a code read one digit off lands on the wrong key.
50 codes · $8.75 per key · cut on a Ilco TM2 blank
Read the code wrong? These are the neighbouring bands.
Send us a photo of the lock and we will tell you which key you need. No code, no guesswork, no charge for asking.