Starrett Combination Square with 6ft Hardened Steel Blade - Precision

In this review of the Starrett Combination Square with a 6' blade, the bottom line is simple: it is a precision layout tool for professionals and serious hobbyists who demand accurate, repeatable measurements. The single biggest reason to buy is the ruler's 4R graduation, which provides clear 8ths, 16ths, quick-reading 32nds and 64ths for fine layout and inspection work. Our review found the unit's hardened blade, steel square head and practical accessories make it a dependable bench or jobsite reference gauge.

Key Features

• 4R Graduation: The ruler markings include 8ths, 16ths, quick-reading 32nds and 64ths so users can measure and transfer fine increments with confidence.
• Hardened Blade: The satin chrome hardened and tempered steel blade resists wear and keeps graduations legible under heavy use.
• Forged Steel Head: The square head is forged and hardened to remain square for scribing right angles and truing other tools.
• Built-in Level and Scriber: The head includes a spirit level and a hardened scriber for layout, depth gauging and quick checks without carrying extra tools.
• Reversible Lock Bolt: The reversible lock bolt secures the blade firmly and allows smooth sliding adjustments when needed.
• Durable Finish: Smooth black enamel head finish and satin chrome blade combine corrosion resistance with readable markings.

Who It's For

The Starrett 6' combination square best suits toolmakers, mechanics, carpenters and serious DIYers who need a compact, accurate layout tool for bench work or portable use. Its compact 6' blade is handy for working in tight spaces, setting small shoulders, and checking the squareness of fixtures and parts.

Those who routinely need longer measuring lengths for framing or large stock layout should consider a larger blade length; likewise, casual users who only need a cheap, occasional guide may find this professional tool more durable and costly than necessary.

Pros & Cons

Pros

• Clear, high-resolution 4R graduations make fine measurements easier to read and transfer.
• Robust construction with a hardened steel blade and forged steel head that hold squareness over time.
• Useful integrated features like a spirit level and hardened scriber eliminate the need for separate small tools.
• Finish and build quality yield smooth sliding and long-term readability of markings.

Cons

• The compact 6' blade limits reach for larger layout tasks compared with longer models.
• Some buyers may find the professional build and price heavier than what casual users require.

Specifications

Brand	Starrett
Number of Pieces	2 (blade and square head)
Blade Length	6 in
Blade Material	Hardened and tempered steel
Graduation Type	4R (8ths, 16ths, 32nds, 64ths)
Head Material / Finish	Forged steel with smooth black enamel
Included Features	Spirit level and hardened scriber

Our Verdict

The Starrett 6' combination square is a compact, well-made layout tool ideal for professionals and dedicated hobbyists who need dependable accuracy in tight spaces. Its hardened blade, forged steel head and practical features justify the investment for those who will use it regularly, while casual users may prefer a simpler, lower-cost alternative.

Frequently Asked Questions

Does the head include a level?
Yes, the square head includes a spirit level and also houses a hardened scriber for layout work.

Is the blade resistant to wear?
Yes, the blade is hardened and tempered steel with a satin chrome finish to resist wear and maintain legibility.

Is this suitable for precision tool checks?
Yes, customers report it is accurate and square enough for checking other tools and precise layout tasks.