4" Double Square
This 4" double square is accurate and adjustable. It is the perfect small-size tools for checking or setting 90 degree angles. Graduated rules are of hardened steel with precision-machined stocks. Starrett tools feature unerring American-made precision and durability. Their century-old...
- Perfect small-size tools for checking or setting 90 degree angles
- 4" double square, accurate and adjustable
- Measuring tools have working surfaces ground to a demanding +/- .00001"
- All rules are marked with 1/64", 1/32", 1/16", and 1/8" graduations
Articles & Blogs
Woodworking comes in all shapes, sizes and varieties. But no matter what your woodworking passion might be, eventually you’re going to need to join together two pieces of wood. And that opens up a world of joinery options.
Whatever method you choose, the question is—do you make your
joinery by hand or by machine? Here’s what our experts had to say…
The Starrett double square is the most accurate I have ever used. It has an easy to adjust screw, excellent rule that is both easy to read as well as precise. It is perfectly straight and square. I have been using it for all my projects from tenon layout, to finish cuts on small stock.
Its great holding a quality, heavy, accurate and not a flimsy tool
Worth Every Penny
I used the Starrett Double Square to lay out shoulders on hand cut Dovetail joints (pins and tails). It's quick, easy and dead on square. It's can also be used as a quick and easy thickness gauge.
Accurate and easy to use.