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Size 4 Starrett Graduated Blade Double Square (1 Each)

4.7 out of 5 stars 37 customer reviews

Price: $62.75 + $6.50 shipping
Only 9 left in stock.
Ships from and sold by PHILLIPS STEEL COMPANY.
10 new from $62.75

Specifications for this item
Brand Name Starrett
Part Number 13A
UPC 049659501094
EAN 0049659501094
Import Designation Made in USA or Imported
Manufacturer Warranty Description Manufacturer
Number of Items 1
UNSPSC Code 27111803


Frequently Bought Together

  • Size 4 Starrett Graduated Blade Double Square (1 Each)
  • +
  • Starrett C33H-12-4R 12-Inch Combination Square with Square Head Only
  • +
  • Starrett 13C 6-Inch Double Square with Hardened Blade
Total price: $255.75
Buy the selected items together

Special Offers and Product Promotions


Product Features

  • 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

Product Description

Product Description

This square is very popular with machinists, toolmakers, and patternmakers. The sliding blades are adjustable making it practical for a wide variety of uses. The faces of the head are ground square, and the 6" (150mm) size has a level.

From the Manufacturer

A popular square with machinists, toolmakers, and patternmakers. The sliding blade is adjustable, making it more practical for a wider variety of uses than a common square with fixed blade.

Product Details

  • Product Dimensions: 1 x 0.7 x 4.3 inches
  • Shipping Weight: 1.6 ounces (View shipping rates and policies)
  • ASIN: B0002FUM2Y
  • Item model number: 13A
  • Average Customer Review: 4.7 out of 5 stars  See all reviews (37 customer reviews)
  • Amazon Best Sellers Rank: #25,411 in Industrial & Scientific (See Top 100 in Industrial & Scientific)
  • Product Warranty: For warranty information about this product, please click here

Customer Questions & Answers

Customer Reviews

Top Customer Reviews

By F. Carrino on January 10, 2008
I spent years building projects using the standard "sort-a-square" you find at the hardware store. I always thought the Starret's were ridiculously priced and I refused to buy one. Needless to say many a project was almost perfect. Finally broke down and bought my first Starret Comb Square a few years ago and ever since it is the first layout tool I reach for!

I have the 12" combo square and this 4" Double Square. I love how accurate these squares are! They may seem on the pricey side but they are the most accurate and most used tools in my shop! The 4" never leaves my side.
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I own both and use the double square 'twice' as much as the combo--just feels better in your hand, and it is practically indestructible if dropped. Changing the blade orientation requires you pushing up on the tightening mechanism and holding as you insert the blade groove. It would be nice to have a 1/8th--1/16th marking on both sides. I rarely have a need for the 1/32-64th markings.
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I am a professional cabinetmaker and I would highly recommend this tool for anyone that needs accurate layout and checking machines for square. I have had other squares that were adequate, but this tool is the best there is.
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Like others, I too revere the consistent accuracy of my Starrett tools and cannot say anything bad about them, except for the price.

In this particular (and rare) case, you can get the same accuracy with the "Lee-Valley Precision Double square", item number: 24N08.01.

It too is guaranteed to be within + / - .001" per foot. It has the same design and is also made in the USA, but it costs significantly less... seventeen-fifty less... about thirty-two percent. They have a six-inch model for only two dollars more.

Budget minded woodworkers who want this type of square can get the same performance for less from Lee Valley.com. Same feel, same look, same accuracy, same features... fewer ducats.
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Verified Purchase
I like this square, but the Lee Valley equivalent is better than the Starrett. It is easier to read because of the matt finish on the steel. The Lee Valley square slides easier and is slightly larger and thicker as well.
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Verified Purchase
Solid piece of work and certain to last for years if I don't lose it--it's pretty tiny. One caveat: the slider measures .957" x .43". How hard would it have been to size it 1.000" x .500"? Means that when you set the slider flush with the end of the rule to use as a square, the rule markings start at 1.043. Odd choice.
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Verified Purchase
Just too cute! Like others before me, I think I'll enjoy having a "pocket square" that's not only cute, but accurate. I bought this and another Starrett Combo Square, after getting frustrated spending an hour setting up a simple job, only to determine everything was off just a little, using my "antique" hardware store variety squares.
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Verified Purchase
Excellent, precise, well machined albeit expensive tool. All as advertised. Received on time in excellent condition. Nothing like an instrument one can count on...and even feels good just to handle. Do I need such precision? Probably not, but this is an extremely handy little thing that fits easily in my apron...unlike a lesser quality square I've been using that sticks and binds when I attempt to lock it at a measurement. And made in the USA.
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