A foldable horizontal ruler, comprising a ruler body having at least two or more ruler units, wherein a connecting end is arranged on the ruler unit, a connecting block is arranged between the ruler units, and the connecting end forms a rotating kit with the connecting block so that the adjacent ruler units can be folded. The connecting end, arranged on the ruler unit, is provided with a connecting block, and the adjacent ruler units can be folded through the connecting block. The ruler body can be folded in multiple segments by designing more than one set of ruler body units, which makes the storage or carrying become more convenient. The magnet is arranged on the rotating shaft and the fixed pin, and the end of the ruler unit exposed. The magnet forms adsorption with the measured object, which reduces long-time lifting and reduces the user's level of fatigue.

An extendible or adjustable length level is provided. The level includes a frame, a slidable member, and a bushing. The slidable member is coupled to the frame and extends and retracts along the frame. The bushing is coupled to one of the frame or the slidable member and couples the frame and slidable member together.

An extendible or adjustable length level is provided. The level includes a frame, a slidable member, and a bushing. The slidable member is coupled to the frame and extends and retracts along the frame. The bushing is coupled to one of the frame or the slidable member and couples the frame and slidable member together.

An expandable level includes a pair of extension bodies, with at least one of the extension bodies carrying a level indicator. Each extension body includes a carriage with a carriage cavity, the carriage cavities aligned with each other and having a pair of exterior top surfaces separated by the carriage cavity. A rail is slidably received in both carriage cavities and has a body surface that remains substantially flush with the exterior top surfaces when the pair of extension bodies are adjacent one another and when the pair of extension bodies are spaced apart from one another.

An expandable level includes a pair of extension bodies, with at least one of the extension bodies carrying a level indicator. Each extension body includes a carriage with a carriage cavity, the carriage cavities aligned with each other and having a pair of exterior top surfaces separated by the carriage cavity. A rail is slidably received in both carriage cavities and has a body surface that remains substantially flush with the exterior top surfaces when the pair of extension bodies are adjacent one another and when the pair of extension bodies are spaced apart from one another.

A tool, such as a level, including one or more polymer/plastic body segment, protective cover and/or seal is provided. The covers discussed herein may limit or prevent dirt or construction materials, such as concrete, from entering into the level body. The cover may also be a non-stick material, such as a polymer outer sleeve, that limits the ability of dirt and construction material to adhere to the level. The level may also include scratch resistant vial windows.

A tool, such as a level, including one or more polymer/plastic body segment, protective cover and/or seal is provided. The covers discussed herein may limit or prevent dirt or construction materials, such as concrete, from entering into the level body. The cover may also be a non-stick material, such as a polymer outer sleeve, that limits the ability of dirt and construction material to adhere to the level. The level may also include scratch resistant vial windows.

An apparatus and methodology for measuring strike and dip of a plane, trend and plunge of a line, directional bearing in the horizontal plane, and angle of inclination in the vertical plane. More specifically, the present invention relates to a compass adapted to measure geological features using single compass configurations for each type of measurement. The compass includes a base, a hinge assembly rotatably interconnected to the base, and a lid rotatably interconnected to the hinge assembly. The lid is operable to rotate around both a major axis and a minor axis of the compass. A sight tube is positioned in a hollow bore of the hinge assembly and is operable to sight directional bearings.

A panel installation assist device for supporting one end of a panel during installation includes a bar, which has a set of holes extending therethrough from a first face thereof. Respective holes are selectively alignable with studs or rafters. Mounting hardware inserted through the holes mounts the bar to the studs or the rafters. The bar has a set of orifices positioned therethrough, each of which has a spirit bubble tube positioned therein, which is engaged to the bar. Respective spirit bubble tubes indicate an orientation of a longitudinal axis of the bar relative to horizontal and vertical. A notch extends into the bar from a first edge thereof and the first face, and between opposed ends of the bar. The notch is configured for insertion of an edge of a panel so that one end of the panel is supported by the bar to facilitate installation of the panel.

A panel installation assist device for supporting one end of a panel during installation includes a bar, which has a set of holes extending therethrough from a first face thereof. Respective holes are selectively alignable with studs or rafters. Mounting hardware inserted through the holes mounts the bar to the studs or the rafters. The bar has a set of orifices positioned therethrough, each of which has a spirit bubble tube positioned therein, which is engaged to the bar. Respective spirit bubble tubes indicate an orientation of a longitudinal axis of the bar relative to horizontal and vertical. A notch extends into the bar from a first edge thereof and the first face, and between opposed ends of the bar. The notch is configured for insertion of an edge of a panel so that one end of the panel is supported by the bar to facilitate installation of the panel.