steel square
measurement instrument
Quick Summary
A steel square is a measurement instrument used to ensure right angles. It consists of two straightedges set at a 90-degree angle to each other. Carpenters and machinists use it to verify correct angles, guide cuts, and locate holes. While similar to a try square, a precision steel square is not graduated. A related tool, the combination square, features a steel ruler with attachments like a center head, protractor, and square head that can slide and clamp onto it.1
Summary created from Britannica articles
using AI.
AI can make mistakes, so verify using Britannica articles.
2 Britannica Sources
Ask Britannica AI about this topic
Britannica doesn't have a full article on this topic, so we've curated a list of our relevant coverage.