Johnson 7" Magnetic Johnny Square® Professional Easy-Read™ Aluminum Rafter Square

This 7" Johnny Square® is a versatile tool for builders and welders. Its thick edge is useful as a saw guide - it can be used directly with the saw against the square for cross cuts or angled cuts using the etched protractor scale. It's magnetic edge also makes it ideal for welders since it attaches to ferrous metal. It can be used for measuring or marking angles and setting and checking square before or after welds are complete.

• Strong magnets for hands-free use 

• Aluminum body with CNC machined edges for greater accuracy and durability

• EZ Read™ laser etching reduces glare outdoors

• Continuous scribing notches for ripping lumber to any width

• Square has 2x4 board dimension markers for measuring 1-1/2", 3" and 3-1/2"