What reasons are there to get a Starrett instead of this one?

I have both this combination square and a Starrett. The Starrett is, of course, much more expensive; however, the Starrett is more accurate and better made. For woodworking, there are some things for which accuracy is very important. The Irwin square I have is out of square by about 1/128" over its length. If I use this to set the angle of my table saw or to make sure my miter gauge is true. 1/128" over 12 inches may not seem like much but it's enough to cause parts I cut to not fit, particularly cutting a wide board. The Starrett combination square is one of the few tools that I use every day in my shop. I expect the Starrett to last my lifetime. In fact, I have a Starrett protractor head and rule that I inherited. It's decades old, but it's completely serviceable and a pleasure to use.

Does this have metric markings as well?

one side is in units of 1/8th inch along one edge and 1/16th inch along the other edge on the ‘flip side’ it in units of 1/32nd inch along one edge and in metric i.e. centimetres (cm) & millimetres (mm) along the other edge it is a a good tool - well made and good value for the money

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IRWIN Tools Combination Square, Metal-Body, 16-Inch (1794471) , Blue

IRWIN Tools Combination Square, Metal-Body, 16-Inch (1794471) , Blue

Product ID: 50066085

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Details

Material
cast zinc
Brand
IRWIN
Colour
Blue
Style
Regular Square
Graduation range
1/8 Inches

📏16-inch rust-proof stainless steel blade

📐Precision etched scales for exact angles

⚖️Durable cast zinc body for perfect heft

Description

📐 Master every angle with precision and style — don’t get left measuring in the past!

BUILT TO LAST - Heavy-duty cast zinc body ensures durability and a premium feel in hand
RUST PROOF RELIABILITY - Stainless steel blade resists corrosion, maintaining flawless performance over time
VERSATILE FUNCTIONALITY - Includes T-Bevel for depth gauging and seamless angle transfers
ENGINEERED FOR PRECISION - Accurate 90° and 45° angle measurements to elevate your craftsmanship
EFFORTLESS PROFESSIONALISM - Brushed finish and solid design make it the go-to tool for serious pros

The IRWIN Tools 16-Inch Combination Square features a durable cast zinc body and a rust-proof stainless steel blade with precision etched scales, delivering reliable 90° and 45° angle measurements. Its integrated T-Bevel adds depth gauging and angle transfer capabilities, making it an essential, long-lasting tool for professionals demanding accuracy and durability.

Specifications

Manufacturer	IRWIN
Part Number	1794471
Product Dimensions	14 x 43.99 x 2.01 cm; 453.59 g
Item model number	1794471
Size	16-Inch
Colour	Blue
Style	Regular Combination Square
Finish	Brushed
Material	cast zinc, stainless steel
Pattern	Solid
Shape	Rectangular
Power Source	Hand_powered
Item Package Quantity	1
Measurement System	Inch
Included Components	METAL COMBINATION SQUARE 16"
Batteries included?	No
Batteries Required?	No
Item Weight	454 g

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