Johnson Level 24" Magnetic Heavy Duty I-Beam Aluminum Level Size:24" With its retractable pins

With its retractable pins

Rats and house mice may consume a lethal does in one feeding

and industrial applications

Feeds and Protects for up to 8 Weeks

If a squirrel tries to feed on any of the 4 spring-loaded perches

Johnson Level 24" Magnetic Heavy Duty I-Beam Aluminum Level Size:24" With its retractable pinsProfessional finish carpenters prefer Johnson levels with removable endcaps because you can scribe a perfectly straight line directly into a corner. Historically, this feature was only found on box levels but Johnson has raised the bar again by offering the industry's first I beam level with a removable endcap. To make this level as easy to use as possible, the oversized 1 2" vials come equipped with Johnson's SurroundView technology for maximum