Patent ID: 8191275

Claim:
An adjustable square device comprising: a body having a substantially uniform cross-section at planes orthogonal to a longitudinal axis, the cross-section having a generally rectangular outline; a first groove extending inwardly from a first end of the body and oriented generally parallel a bottom surface of the body, the first groove oriented more proximate a top surface of the cross-section than the bottom surface; a second groove extending inwardly from the first end and oriented orthogonal the first groove, the first and second grooves intersecting at a vertex; a tunnel extending from the vertex to a second end of the body; a blade slidably engagable into one of the first or second grooves; a retaining stem positioned within the tunnel such that an initial end extends outside the body and a terminal end passes through the vertex to engage and retain the blade in a selected position; and, a rectangular void formed along the bottom surface of the body.