Stanley 24 in Magnetic I-Beam Level (STHT42411)0. 0015" in level accuracy Shock absorbing end caps hold up to heavy use Heavy duty body design for wide base and thick extrusions Magnetic: Yes Continuous edge to scribe and score lines Color: Yellow Black This 24" I Beam level (Magnetic) is designed with the end user in mind. The heavy duty body design accommodates wide base and thick extrusions. You have a continuous edge to scribe score lines. It features shock absorbing end caps, Large 12mm