A speed square can be used in several practical ways: as a tri square, miter square, protractor, line scriber or saw guide. The versatile speed square, originally made to measure roof rafters, is a tool used by carpenters for a variety of projects.
In order to use a speed square:
- Use as a try square
- Use as a miter square
- Use as a protractor
- Use as a line scriber
- Use as a saw guide
Use the speed square to mark lines that are straight, square and 90 degrees. The tool has a lipped edge to provide quick and accurate measurements.
The speed square is an isosceles triangle, which measures exactly at 45 degrees at its diagonal edge.
The speed square has degree graduations to make reading and marking angles easy. Along the diagonal edge, each marking represents the degree from zero to 90. To establish a certain degree, hold the pivot point against the board until the desired graduation mark aligns with the edge of the board. Draw a line along the square opposite the diagonal edge.
Use the two rows of notches to make parallel lines to the board for measuring cuts precisely.
Use the speed square as a straight-edge guide for portable circular saw cuts.