Q about Engineering (steel) Squares

What's that little recess / nick / indentation for? The one in the inside corner between blade and handle? Izzt for a pencil? Izzt so you can sneak in a feeler gauge right up to the edge? Izzt like the uvula?
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
mttt wrote:

It is for clearance. If you are checking squareness of two surfaces and the edge where the two surfaces meet together is not beveled, a small lip or burr would make checking difficult. -Bruce
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
And all this time I thought it was a pivot.
Kevin
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.