Johnson Level 72" Top-Reading Aluminum Level - 5 Vial Mallets The durable molded housing is

The durable molded housing is impact-resistant

Anodized aluminum tri-oval slider won’t twist and resists rust

External access to overload reset (CSCR)

the gate includes door sockets that provide extra holding power for pressure mounting in openings between 26 and 42 inches wide

Johnson Level 72" Top-Reading Aluminum Level - 5 Vial Mallets The durable molded housing isJohnson's 3700 I beam level was designed to be durable and easy to use so much so that it has been the standard in the industry for over 30 years. Its heavy duty aluminum frame ensures accuracy and is durable enough to withstand even the roughest jobsite abuse, and that frame is protected by shock absorbing end caps if the level is accidentally dropped. The level also comes equipped with replaceable, durable acrylic vials that are impact resistant