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PacTool

PacTool Gecko Gauge Aluminum - Hardie Board Siding Gauge for Installation

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Availability: In Stock.
Fulfilled by Amazon
Arrives Oct 21 – Oct 22
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Style: ALUMINUM


Size: 5/16” Thickness for Hardie Siding


Features

  • PRO GRIP CLAMP: Ideal for one-person installation this siding mounting block gauges and support the next course for nailing, with virtually no layout time; Making any job ideal for one-person installation, with more accuracy, and 50% percent faster.
  • SIDING TOOLS: Slide it, lock it, nail it; These hands-free clips are designed to hold the board at the correct height and help install fiber cement siding easily, with less fatigue, while producing accurate and consistent siding reveals.
  • MOUNTING BLOCK: Our gauges can be adjusted for 5, 6, 7 and 8 siding reveals, and the patented Friction-Cam mechanism supports full 12' cement-board siding lengths; This feature ensures perfect and equal spacing between each board.
  • PROFESSIONAL EQUIPMENT: Take your siding project to the next level with our heavy-duty contractor-grade aluminum house siding tool; This product is recommended for use with primed (non-painted) siding products.
  • PACTOOL:Trusted for decades, we are the leaders in specialized construction, renovation, and remodeling designs; Our cutting-edge product line inspires craftspeople and DIYers to work smarter, measure better, and repair more efficiently.

Description

Crush your next commercial siding project with our PacTool SA902 Gecko Gauge Fiber Cement Siding Tool, ideal for one-person installation, and helps to decrease labor time. This is a must-have for any tool kit for home. Your next shingle job will be more manageable and productive with our efficient clamping tool that supports and gauges cement-board siding application by acting as a second pair of hands. This allows your siding to be level and adequately spaced while working your way up the wall, essentially eliminating the need for any layout. It is adjustable for 5”, 6”, 7”, and 8” siding reveals. This gauge has a patented friction cam mechanism that powerfully holds a 12-foot piece of fiber cement siding for hands-free nailing and is constructed from an extra durable aluminum. At PacTool, we are known for our outstanding line of exterior products in the construction, renovation, and remodeling sector and take pride in providing exceptional solutions that help to reduce fatigue and frustration for craftspeople, artisans, and DIYers. From the Manufacturer Save time and money installing fiber-cement siding with the Gecko Gauge. Using the handy siding gauge, one person can install siding quickly while ensuring each course stays level. It will help you produce a consistent siding reveal and reduce the need fo

Material: Aluminum


Brand: PacTool


Item dimensions L x W x H: 2.5 x 6 x 11 inches


Color: Silver


Shape: Flat


Brand Name: PacTool


Item Highlight: Aluminum construction for durability. Compatible with Hardie board & 5/16" fiber cement siding. Contractor-grade tool.


UPC: 645646902006


Number of Items: 1


Unit Count: 1 Count


Global Trade Identification Number: 06


Included Components: Pair of Gecko Gauges


Item Type Name: siding gecko gauge


Manufacturer: PacTool


Model Number: SA902


Part Number: SA902


Item Dimensions: 2.5 x 6 x 11 inches


Item Weight: 1.5 pounds


Color: Silver


Item Shape: Flat


Item Form: Bar, Flat Rod, Rod


Material: Aluminum


Grade Rating: Commercial


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Oct 21 – Oct 22

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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Similar Products

Top Amazon Reviews

    • So good, so worth it.
Style: ALUMINUM Size: 5/16” Thickness for Hardie Siding
So good, so worth it. It's like having 4 hands. Going up a ladder with a plank, a nailer, and a level, you still do not need another person to help you with this. If you are working alone, I actually am not sure how you side the house without these. I'm sure you would have to fabricate something similar. Even working with another person, I found these to be amazing. Have the other guy be cut man on the ground, and keep sending you up pieces that you set perfectly each time without having to re-measure. For the first 1/2 of the house I did, were were constantly re-checking level, and our layout and it was a good thing we did, these gauges take getting used to. Make sure you flush the gauge all the way up to the bottom of the board. Sometimes they can sit in an angle, and that 1/8th inch on 1 board can get out of hand in a couple rows if you aren't paying attention. Also make sure you keep the height adjustment bolts tight. I actually lost one of my plastic washers, but was able to find the bolt. Probably not that hard to replace, but just a hassle. If you are going to have these higher than a few feet over anything but grass, buy these and not the plastic ones. I dropped mine on concrete from about 20 feet and dented a corner, still works perfectly. These hold real well, I felt comfortable in how well these held on to slide in 12' boards from a ladder 10' away. Even with the tight grip, there was no damage to any of the boards. The locking handle moves super easy, doesn't take hard wrenching or anything that could be problematic on a really high ladder. Does only 1" increments for reveals. 5",6",7",8". Probably not an issue for most, but something to keep in mind. Still an excellent tool for holding a plank in place, even if I had to fudge a board 1/4"-1/2" or so to adjust my layout. I bought these for 1 siding job and found them to be worth the money. I sold them to my carpenter for 50% cost, but I'm sure you could do better if you wanted. ... show more
Reviewed in the United States on November 17, 2014 by R & M
    • Quality
Style: ALUMINUM Size: 5/16” Thickness for Hardie Siding
Idk people have issues with these. Use them correctly. I own a siding business and I have about 10 pairs of these and they’ve been working great since I bought them 10 years ago.. we put them thru very rough use, negative temps up into triple digits. The only thing wearing on them is the rubber to grip the siding but they still hold and don’t have any issues. Very much worth the money. They’ve lasted about 500 houses worth of siding with the average house being 34 square ... show more
Reviewed in the United States on March 3, 2026 by Andy White
    • I'm really glad I got this tool!
Style: ALUMINUM Size: 5/16” Thickness for Hardie Siding
I started to skip writing this review because there are already so many good ones, but I just couldn't resist. A tool this simple, that does exactly what it says it will do, is something worth telling people about. This is my first time ever putting up Hardie plank and this tool has made it really easy to get a great looking job. I chose the aluminum version because I do drop things occasionally, and because I used the primed Hardie plank - not the pre-painted ones. A scuff or two on my planks doesn't matter since there will be a coat of primer and two coats of finish going on these boards, so I opted for the durability of metal. Learning from the reviews here on Amazon, I have been careful to be sure that I set the gauge flush against the plank on both sides - so it's straight, not slanting slightly. I've also been careful to check it once the next plank is resting on it, to be sure that I didn't jar it out of place (this has not been a problem, even once - the clamp is very secure) - and then I nail it down. It's quicker to do it than to describe it! Get this tool - and fear not, first timer! ... show more
Reviewed in the United States on August 1, 2010 by B.E.E.
    • Works well, takes some getting used to
Style: ALUMINUM Size: 5/16” Thickness for Hardie Siding
The piece where the board rests is a small piece of hard plastic. It seems to chip the edge of the board sometimes. Also they like to go on at an angle, be sure to make them flat. The first row using this was weird for us, but it did not have the house behind it, because it over lapped our foundation. Once you get to where you have actual house behind it the work great. We bought the other original plastic ones and they seemed to be slightly better on the boards. Maybe it’s our learned use. I would recommend the original plastic over the aluminum geckos. These support the board great. ... show more
Reviewed in the United States on December 4, 2025 by aurora oberg
    • Simple & effective
Style: ALUMINUM Size: 5/16” Thickness for Hardie Siding
Review Image by Peter Franzen
It's hard to imagine installing lap siding without this tool. I have the metal version for Hardie lap siding and it's great-- it makes the installation process a 1-person job even with the full 12-foot long pieces of siding, and everything always lines up nicely. It's still worth double-checking your work every few rows with a laser or a traditional level, especially if you're putting up rows on either side of a window that need to align when you get to the top. But this is a small step that just adds a few moments to the overall process. Nice tool, very sturdy, works as expected. ... show more
Reviewed in the United States on July 22, 2020 by Peter Franzen
    • It went well!
Style: ALUMINUM Size: 5/16” Thickness for Hardie Siding
Everything went well and the best part is the seller used USPS to my PO Box. So glad 😁. Price was a little bit more for the product, but I needed it to hold up to it's intended purpose. Thanks for helping me out! DK.
Reviewed in the United States on June 28, 2026 by Derek
    • Don’t do siding without these.
Style: ALUMINUM Size: 5/16” Thickness for Hardie Siding
I can’t recommend these clamps enough. I sided a 2200 sq ft house with Alura cement plank siding almost entirely by myself. Some reviews say that they scratch the planks - but I think if you’re installing pre-painted materials you’re asking for such trouble. Thats just not the way things work, and if you try you’ll be disappointed. Putting a finish on materials before installation is like washing dishes before you eat. Reviews also say they dont’t hold the planks well, or there is a gap that the plank can slip into. I can see how this might happen, but on this whole house i had a clamp slip once, and that was because i was trying to slide the plank along the clamp without lifting it - obviously an unsafe move. Under normal careful use the friction clamp seems to work fine. The gap issue wasn't a problem for me - its easy to get then to grip without over-clamping them and creating a gap. Honestly, if you can’t figure these out, you should not be building or repairing your house. You’re goinna poke an eye out or something. I would recommend that you buy some fiberlock nuts to replace the “acorn” nuts that hold the cam pins in place - the repeated use loosens them and the fall 20 feet off your scaffolding and you never find them. At Ace fiberlock nuts are like $0.35 each. So for an extra dollar i got a perfect tool. Not sure how long the friction pads will hold up - like i said, after one house they work fine, but Professional use might wear them out. But if you’re a professional, are you going to worry that an inexpensive tool only lasts 5 or 10 houses? I think just the materials for my siding project came out to over $4000, plus $1400 in scaffolding rental, blah blah, $$$$. Replacing this tool when it wears out is not going to cut into your profits much. Even if they were single-use it would be worth it, these clamps are so helpful. ... show more
Reviewed in the United States on August 12, 2021 by M. Kepler
    • Incredibly helpful
Style: ALUMINUM Size: 5/16” Thickness for Hardie Siding
These things are amazing. I don’t know how I could have done the job without them
Reviewed in the United States on June 22, 2026 by Tim Cull

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