AZM X Lock is a selective lock which can be installed in the chosen X landing nipple in a series of X nipples. It has retractable keys and an integrated packing mandrel that allow the tool to lock into a profile nipple and create a seal.
AZM XN Lock is the non-selective version of the X lock. The keys have an angled shoulder, and the lock is designed to stop against the No-Go diameter at the bottom of an XN Nipple.