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IRWIN Strait-Line Marking Chalk - Image 1
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Irwin Tools

IRWIN Strait-Line Marking Chalk

$4.22across 22 retailers
Model: 65201Color: BlueUPC: 24721652010
Lowest at Amazon
$6.89 at Amazon
Lowest at any Popular Retailer
$4.75 at Newegg.com

Where to Buy

Prices last updated: August 24th 2026 2:17 am

Pros

  • Provides clean, precise, and consistent blue chalk lines, trusted by professionals for detailed marking tasks.
  • Has a lonasting supply with reliable performance throughout use, making it a practical choice for frequent users.
  • Does not stain surfaces like lawns or driveways and washes away easily, even after outdoor use on snow.
  • Offers good visibility against white backgrounds, such as snow, making it versatile beyond traditional construction uses.
  • Serves well as a reliable chalkline refill and a perfect replacement for original chalkline tubes.
  • Creates visually striking color effects for creative uses, such as gender reveal events.
  • Difficult to find comparable quality or color options easily in local stores, making this a go product for many.

Cons

  • The blue color might be lighter than some users prefer; a darker shade would improve satisfaction.
  • Brand familiarity exists, but some users remain unsure if there are objectively better options available elsewhere.

Bottom Line

The IRWIN Tools STRAIT-LINE 65201 Blue Marking Chalk is a durable, reliable choice for professionals and DIYers who need clean, visible, and easily removable blue chalk lines. Its versatility extends beyond typical construction uses, and its long-lasting supply means fewer refills needed. If you want more intense color saturation or are exploring alternatives, keep an eye out for other premium chalk options, but this product remains a trusted staple for precise marking needs.

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