As a saw guide, stair layout tool or rafter tool, Johnson's Johnny Square® 12" rafter square will help you get the job done accurately and easily. Its solid aluminum body construction with CNC machined edges provide greater accuracy and durability, while the low-glare, protective powder-coated finish makes the permanent graduations and numbers easy to read. This square also features scribe notches starting at 1-3/4" that are useful when transferring outside increments from the pivot point, and handy markers that measure 2x4 board dimensions of 1-1/2", 3" and 3-1/2".

• Solid aluminum body with CNC machined edges for greater accuracy and durability
• Permanent graduations and numbers are easy-to-read
• Scribe notches starting at 1-3/4" transfer outside increments from pivot point
• Low-glare, protective powder coated finish
• Thick edge is useful as a saw guide
• 2x4 board dimension markers for measuring 1-1/2", 3" and 3-1/2"
• Comes with instruction manual including rafter tables