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PacTool Gecko Gauge for Siding - Fiber Cement & Engineered Wood Install

  • Based on 90 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon

Arrives Monday, Oct 19
Order within 11 hours and 48 minutes
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Style: Universal


Size: Universal: 5/16"–5/8" for Hardie & LP Siding


Features

  • Universal Compatibility Works with Hardie fiber cement and LP SmartSide engineered wood siding for seamless installation
  • One-Person Installation Holds siding in place, allowing for fast, precise nailing without extra hands or complex layout
  • Adjustable Siding Reveals - Works with Hardie and LP Smartside planks from 4 inches to 8 inches tall, creating consistent reveal spacing on every project
  • Heavy-Duty Support Designed for 12 foot Hardie boards and 16 foot LP SmartSide planks, helps ensure reliable performance
  • Non-Marring Design - Features a protective rubber locking grip to help prevent scatches on primed and pre-finished siding

Description

Upgrade your siding installation with the Gecko Gauge, the only tool you need for both Hardie® fiber cement and LP® SmartSide® engineered wood siding. Engineered for fast, one-person installation, this professional-grade siding gauge supports full 12-foot Hardie boards and 16-foot LP SmartSide planks, ensuring perfect spacing and level placement every time. With a patent-pending design, the Gecko Gauge allows for adjustable 4”–8” siding reveals, decreasing layout time and increasing efficiency. The locking grip features a protective rubber lining to prevent damage to primed or pre-finished siding, making it the go-to tool for contractors and siding professionals. Includes 2 Adjustable Gecko Gauge Clamps. About PacTool: Trusted for decades, we are the leaders in specialized construction, renovation, and remodeling tools. Our cutting-edge product line helps construction professionals work smarter, measure better, and repair more efficiently. Driven by direct feedback from tradespeople, Pactool leverages innovative designs and premium materials to produce professional-grade hand tools to help you get the job done right. PacTool is the original creator of the Gecko Gauge, providing easy and reliable one- person installation for siding professionals for over 30 years.

Brand: PacTool


Material: Plastic, Rubber


Item dimensions L x W x H: 8.4 x 2.75 x 2.82 inches


Item Weight: 1.7 pounds


Item Highlight: One-person, universal installation tool for both Hardie & LP SmartSide. Durable grip supports 12' & 16' planks. See more


Brand Name: PacTool


Item Highlight: One-person, universal installation tool for both Hardie & LP SmartSide. Durable grip supports 12' & 16' planks.


Number of Items: 2


Unit Count: 1 Count


Number of Packs: 1


Part Number: SA913


UPC: 645646000009


Manufacturer: General Tools


Included Components: (1) Instruction Manual


Model: SA913


Material Type: Plastic, Rubber


Thread Style: Adjustable


Item Dimensions: 8.4 x 2.75 x 2.82 inches


Item Weight: 1.7 pounds


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Oct 19

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

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Top Amazon Reviews


  • Just buy these now if you're using Hardie siding.
Style: Universal Size: Universal: 5/16"–5/8" for Hardie & LP Siding
Replacing cedar siding with the Hardie siding. They come in 12' pieces. I am of very little help to my husband. I know that I owe my life to these Gecko guages. Husband was able to do about 90% on his own because of how these just clamp on so securely. If your wall isn't perfectly straight and you're trying to cheat to make it look right these clamps make it easy to fudge your run a bit, too. I had purchased cheaper guages prior, and there's absolutely no way those flimsy things would have worked. I know I would be the main character in a Dateline episode if I had kept them and not spent the more money on these. ... show more
Reviewed in the United States on July 24, 2026 by Lori

  • Super helpful
Style: Universal Size: Universal: 5/16"–5/8" for Hardie & LP Siding
These are just awesome!! Made installing our Hardi siding and breeze!! Only two ppl needed to install the siding! Would recommend to anyone with the same job, and would purchase again!
Reviewed in the United States on July 13, 2026 by Jessy B.

  • Slightly disappointed
Style: Universal Size: Universal: 5/16"–5/8" for Hardie & LP Siding
I bought these for a Hardie Siding job thinking why not get the best....right? I was slightly disappointed in their performance, they clamped on great after you got them on but it was slightly difficult at times to get the metal pc in behind the Siding (if it was nice and tight). It seemed to pull the Siding slightly loose which is not ideal if you want to avoid face nailing. ... show more
Reviewed in the United States on August 1, 2026 by Daniel Byler

  • Well worth the price excellent product.
Style: Universal Size: Universal: 5/16"–5/8" for Hardie & LP Siding
This product works as advertized and beyon my expectations. I would recommend this product, especially if you are working alone this product acts as a second set of hands. tks guys for making this product.
Reviewed in the United States on April 13, 2026 by Robert Brown

  • Great tool!
Style: Universal Size: Universal: 5/16"–5/8" for Hardie & LP Siding
Works great. Easily adjustable and makes installing hardie a one man job.
Reviewed in the United States on April 21, 2026 by Daniel Farmer

  • Más o menos
Style: Universal Size: Universal: 5/16"–5/8" for Hardie & LP Siding
No era lo que esperaba
Reviewed in the United States on April 2, 2026 by Juana isamar cruz

  • Quick and easy to use.
Style: Universal Size: Universal: 5/16"–5/8" for Hardie & LP Siding
So much better than doing it by measuring. I did not have to much siding to put up but it was will worth the purchase. Good quality.
Reviewed in the United States on April 8, 2026 by Dana M

  • Very Handy
Style: Universal Size: Universal: 5/16"–5/8" for Hardie & LP Siding
These are so handy; and I’m glad I paid the bit extra for the adjustable version. I did a large section of my house repairing / replacing clapboards and was able to work unassisted thanks to these tools. I am planning to do more this spring and am actually looking forward to it knowing how much easier it is with these in my tool arsenal. ... show more
Reviewed in the United States on March 19, 2026 by Tamahawk

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