The Line Level 60pc Jar is a container that includes 60 individual line levels, which are small, portable tools used for checking the level or alignment of a line or surface. These line levels are typically used in construction, landscaping, or masonry projects where it's necessary to ensure that a string or rope is level over a distance. The levels are compact and easy to attach to a string, and they feature a vial with a bubble to indicate whether the line is level. The jar packaging makes it convenient for bulk purchasing, providing a handy supply of line levels for multiple tasks or jobs.