A level includes a level body having top, bottom and side walls, and a window that opens into the interior of the body. A vial is positioned within the window. The vial is carried by, and rotatable relative to, a vial mount. The vial mount and the level body include engagement structure that fixes the vial mount against movement relative to the level body. Securing members, such as screws, are movably carried by the vial mount, and are engageable with the vial in order to selectively adjust the angular position of the vial relative to the level body and to selectively fix the angular position of the vial relative to the vial mount, and thereby relative to the level body.