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A combination square is a multi-purpose measuring and marking tool used in metalworking, woodworking, and stonemasonry. It is composed of a rule and one or more interchangeable heads that can be attached to the rule. [1] [2] Other names for the tool include adjustable square, combo square, and sliding square.
Speed square, or rafter square, or rafter angle square, or triangle square, or layout square A speed square is a triangular carpenters square combining functions of the combination square, try square, and framing square into one. It can be used to calculate and mark angles, to suspend a plumb bob, and as a fence for a circular saw.
Try square; Steel square is also known as a framing square. Historically a square with measurement markings on it was known as a "square rule" which is also a layout method. Combination square; A Plumb-bob on a string is sometimes used with a plumb-rule or plumb-square to measure vertical or horizontal and to transfer marks between timbers ...
A sliding T bevel, also known as a bevel gauge or false square [1] is an adjustable gauge for setting and transferring angles. Different from the square , which is fixed and can only set a 90° angle , the sliding T bevel can set any angle and transfer it on another piece.
Example of a combination drive system. At center, a Torx T25/slot Dual Drive screw; at left, a 3 ⁄ 16-inch (4.8 mm) flat-blade screwdriver; at right, a T25 screwdriver. The screw will accept either screwdriver. Some screws have heads designed to accommodate more than one kind of driver, sometimes referred to as combo-head or combi-head.
The steel square is a tool used in carpentry. Carpenters use various tools to lay out structures that are square (that is, built at accurately measured right angles ), many of which are made of steel , but the name steel square refers to a specific long-armed square that has additional uses for measurement, especially of various angles .