The Jonard Tools TTB-6 Barrel Lock Plunger Key is designed to unlock Channell LK03029817 and Highfield 93180775-S CATV barrel locks quickly and easily. It only works with these 2 types of locks with inside diameters from 0.176- to 0.196- (do not try to use for other purposes as it will not work). This barrel lock plunger features the following:

Made of high carbon alloy steel for heavy-duty use and engineered for superior tamper resistance
Smooth plunger and heavy-duty spring designed for high strength and durability plus the tool is serialized for extra protection
Designed only for the CATV barrel locks mentioned above, does not work with other locks including those for electric and gas meters