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 tool that can be retained in a predetermined position relative to a workpiece and to perform an operation on the workpiece includes a head portion and a tail portion. The head portion includes a leg that is adapted to engage a first portion of a workpiece when the tool is in a predetermined position relative to the workpiece. The tail portion extends from the head portion and includes a support having a recess that is adapted to engage a second portion of the workpiece when the tool is in a predetermined position relative to the workpiece. An operation-performing device is supported on the tail portion and is operable to perform an operation on the workpiece when the tool is in the predetermined position relative to the workpiece.

A tool that can be retained in a predetermined position relative to a workpiece and to perform an operation on the workpiece includes a head portion and a tail portion. The head portion includes a leg that is adapted to engage a first portion of a workpiece when the tool is in a predetermined position relative to the workpiece. The tail portion extends from the head portion and includes a support having a recess that is adapted to engage a second portion of the workpiece when the tool is in a predetermined position relative to the workpiece. An operation-performing device is supported on the tail portion and is operable to perform an operation on the workpiece when the tool is in the predetermined position relative to the workpiece.

An L shaped versatile, combination construction square for a carpenter having measured marks for all common framing combinations about its six sides. A series of template openings, as well as two adjustable base arms able to set angles for setting plumb, lock into a position to cut rafter tails and birds mouths as well as stair treads and risers. It has a precise scale that accommodates a traditional carpenter's rectangular 3/16 inch wide pencil lead that allows for ⅛ inch increments that can be transferred the length of a board using the adjustable arms. It also functions as a framing square and a laser angle finder.

A ruler with a slot is described herein. The slotted ruler may include a plurality of widthwise and lengthwise lines that form different sized rectangles and squares located above and below the slot for measuring. The lines may be spaced at fractional metric or imperial intervals. The slotted ruler may further include a plurality of hatch marks. The slotted ruler may further include a set of at least the numbers one, two, three and four spaced 1 centimeter or 1 inch apart located above the slot, an aligned set of numbers located below the slot, as well as an offset set of numbers.

A ruler with a slot is described herein. The slotted ruler may include a plurality of widthwise and lengthwise lines that form different sized rectangles and squares located above and below the slot for measuring. The lines may be spaced at fractional metric or imperial intervals. The slotted ruler may further include a plurality of hatch marks. The slotted ruler may further include a set of at least the numbers one, two, three and four spaced 1 centimeter or 1 inch apart located above the slot, an aligned set of numbers located below the slot, as well as an offset set of numbers.

A tool for marking sheet metal prior to bending in a bending brake, includes a scale having a first end, an opposite second end, a longitudinal axis, and four faces. Each of the four faces include a plurality of marking stations. A cross member is rotatably connected to the first end of the scale. The cross member has a surface which is disposed perpendicular to the longitudinal axis, and is configured to abut the edge of the sheet of metal. The tool is positioned at a first location on the sheet of metal and marks are made at the marking stations. The tool is then moved to a second location on the sheet of metal and a second set of marks are made. The two sets of marks are used to align the sheet of metal with the bend line of a bending brake so that accurate bends can be made.

A tool for marking sheet metal prior to bending in a bending brake, includes a scale having a first end, an opposite second end, a longitudinal axis, and four faces. Each of the four faces include a plurality of marking stations. A cross member is rotatably connected to the first end of the scale. The cross member has a surface which is disposed perpendicular to the longitudinal axis, and is configured to abut the edge of the sheet of metal. The tool is positioned at a first location on the sheet of metal and marks are made at the marking stations. The tool is then moved to a second location on the sheet of metal and a second set of marks are made. The two sets of marks are used to align the sheet of metal with the bend line of a bending brake so that accurate bends can be made.