Abstract: A carpenter's level is described which includes an inclination indicator mounted in the web of an I-beam shaped frame. The inclination indicator includes a pair of transparent window panels affixed on each side of the web to enclose an aperture in the web, the window panels having interiorly directed sockets for holding the pin upon which a pendulum swings. Indicia is imprinted on the inside face of the window panels so that it will not wear off. Bolt holes through the window panels and web positively seat the window panels in alignment with the level's faces. Adjustment screws through the pivot shaft apertures at the center of each of the window panels enable axial adjustment of the pendulum and pivot shaft.