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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 ...
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.
Several companies in Austria, Italy, France and Belgium manufacture what is commonly known in North America as a Euro(pean) combination machine, which typically contains a sliding-table saw with a scoring blade, a shaper, a thicknesser, a jointer, and a mortiser. These machines generally have three motors, one for the table saw, one for the ...
Common lines made using a speed square include perpendicular cut marks and Angles definition of an angle for roofs, stairways, and decks. The tool uses a 0° reference. This means when a board is squared off the tool reads 0°. The angle derived is actually a complementary angle, for example a 22.5° angle is actually 67.5°. The sum of the ...