US Patent 11255667 Extendible level with non-coplanar extension surface

A level apparatus is disclosed including a body with a slide channel, a slider coupled with the body via the slide channel to slide parallel with respect to the body to extend a length of the level apparatus, a planar base surface on a side of the body to allow the level apparatus to rest on a work surface the orientation of which is to be measured, and a non-coplanar contact member at an endcap of the slider to rest on the work surface when the slider is in an extended position, wherein a tip of the non-coplanar contact member resting on the work surface is coplanar with the planar base surface.