A speed square is provided including a triangular flat plate having measurement markings indicated on at least one face, a T bar affixed to, and extending along, the length of a first side of the triangular flat plate, and an extension element hingedly connected to an end of second side of the triangular flat plate opposite the T bar. The extension element having measurement markings indicated on at least one face, such that the measurement markings of the triangular flat face continue on the extension element.

A speed square is provided including a triangular flat plate having measurement markings indicated on at least one face, a T bar affixed to, and extending along, the length of a first side of the triangular flat plate, and an extension element hingedly connected to an end of second side of the triangular flat plate opposite the T bar. The extension element having measurement markings indicated on at least one face, such that the measurement markings of the triangular flat face continue on the extension element.

A speed square is provided including a triangular flat plate having measurement markings indicated on at least one face, a T bar affixed to, and extending along, the length of a first side of the triangular flat plate, and an extension element hingedly connected to an end of second side of the triangular flat plate opposite the T bar. The extension element having measurement markings indicated on at least one face, such that the measurement markings of the triangular flat face continue on the extension element.

A speed square is provided including a triangular flat plate having measurement markings indicated on at least one face, a T bar affixed to, and extending along, the length of a first side of the triangular flat plate, and an extension element hingedly connected to an end of second side of the triangular flat plate opposite the T bar. The extension element having measurement markings indicated on at least one face, such that the measurement markings of the triangular flat face continue on the extension element.

Adjustable, handheld, woodworking squaring jig that is stable, versatile, and easily maneuvered for the rapid and precise squaring of jointed cuts of varying size across various workpieces which can be used in various work environments, the jig being freely adapted to move across an axis of motion as to accommodate mortise and hinge plate notch cuts of varying sizes, the jig also having a plurality of clamping surfaces which allow it to be conveniently secured to a variety of workpieces and surfaces in different positions, as well as a plurality of slots which allow for the attachment of index clamps, screws or bolts to firmly attach the jig to itself and the mortise or notch cut to be squared.

A square gauge apparatus configured for being selectively and removably mounted on a leg of a carpenter's square has a ledge having a ledge first surface and an opposite ledge second surface, the ledge first and second surfaces being parallel and offset, a first abutment extending from the ledge and having a first abutment front surface that is perpendicular to the ledge first surface, a second abutment extending from the ledge opposite the first abutment and having a second abutment front surface that is perpendicular to the ledge second surface and parallel to and coplanar with the first abutment front surface, and a slot formed adjacent to the ledge between the first and second abutments, the slot having a slot end surface that is parallel to and coplanar with the first and second abutment front surfaces.

Adjustable, handheld, woodworking squaring jig that is stable, versatile, and easily maneuvered for the rapid and precise squaring of jointed cuts of varying size across various workpieces which can be used in various work environments, the jig being freely adapted to move across an axis of motion as to accommodate mortise and hinge plate notch cuts of varying sizes, the jig also having a plurality of clamping surfaces which allow it to be conveniently secured to a variety of workpieces and surfaces in different positions, as well as a plurality of slots which allow for the attachment of index clamps, screws or bolts to firmly attach the jig to itself and the mortise or notch cut to be squared.

An adjustable T square alignment device for providing enhanced flexibility while cutting drywall or other planar objects. The adjustable T square alignment device comprises a blade defining a rigid, elongated structural body having an integral elongated sliding slot, a head defining a rigid structural member having a wide base portion and a narrow sliding portion, and a fastening system operative to both secure the head to the blade, with the sliding portion positioned in the sliding slot, and fix the head at a desired lengthwise position on the blade. In this regard, the head may be selectively repositioned along the length of the blade by sliding it lengthwise but not moved angularly relative to the blade.

An adjustable T square alignment device for providing enhanced flexibility while cutting drywall or other planar objects. The adjustable T square alignment device comprises a blade defining a rigid, elongated structural body having an integral elongated sliding slot, a head defining a rigid structural member having a wide base portion and a narrow sliding portion, and a fastening system operative to both secure the head to the blade, with the sliding portion positioned in the sliding slot, and fix the head at a desired lengthwise position on the blade. In this regard, the head may be selectively repositioned along the length of the blade by sliding it lengthwise but not moved angularly relative to the blade.

A speed square is provided including a triangular flat plate having measurement markings indicated on at least one face, a T bar affixed to, and extending along, the length of a first side of the triangular flat plate, and an extension element hingedly connected to an end of second side of the triangular flat plate opposite the T bar. The extension element having measurement markings indicated on at least one face, such that the measurement markings of the triangular flat face continue on the extension element.