Starrett Square Head for Combination Square Blade

The Starrett square head for combination square blades is a precision layout and measuring tool component. It pairs with a standard slotted combination square blade (also called a combination square rule) to make a complete combination square. Machinists, metalworkers, woodworkers, and toolmakers use it to check and mark 90° and 45° angles, measure depths and heights, and scribe accurate layout lines.

Key Features:

• Fits slotted Starrett combination square blades, so you can swap blades or build a custom square
• Machined, hardened and ground reference faces for accurate squareness and repeatable layout work
• Works for 90° and 45° layout, checking squareness, and depth and height measurement
• Locking mechanism holds the blade at the setting you choose
• Built by Starrett, a long-standing American maker of precision measuring tools

A Starrett square head is a dependable choice for shop, tool room, and job-site layout work. It is also useful for replacing a worn or damaged head, or for adding a head to blades you already own.