Does this work on 12 inch siding

No, neither the SA902 nor SA903 work on 12" siding. There is a model SA902.12 that is made specifically for use on the 12". It is basically the model SA902 with a pair of long aluminum extensions included in the package. Since this model is made of aluminum it isn't recommended for use on the pre-finished siding as the aluminum tends to leave marks.

What makes this zone 10 specific?

http://www.jameshardie.com/dealer/hardiezone.shtml + http://www.jameshardie.com/homeowner/hardiezone-video.htmlThe Zone 1 - 5 product has a specific drip edge design and since this tool clamps at that edge, you use it on zone 6 - 10 products.

Would these work installing the big 0.312-in x 48-in x 96-in hardiepanel vertical fiber cement siding panels?

These are for panel siding … clamps to Z Flashing to hold up the panel. https://www.amazon.com/dp/B001PBJ6QM?tag=price125420e-20&ascsubtag=wtbs_60358245085322c828fd7606

Will this work with 1in by 8in cedar bevel ?

Probably not. It’s only for 5/16 siding

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PacTool International SA903 2-Piece Gecko Gauge Hardi Board Siding Gauges by PacTool International [並行輸入品]

Product ID: 729175908

Details

Brand
PacTool
Material
Plastic
Item dimensions L x W x H
30.5 x 30.5 x
Item Weight
1.3 Pounds
UPC
716080054214

📏Adjustable 1/4" to 4-8" siding panels

⚙️Friction-cam mechanism for secure locking

🛠️Lightweight 1.3 lbs, easy handling

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Description

📐 Nail your siding project with precision and ease!

NO ASSEMBLY NEEDED - Ready to use straight out of the box—get your project started faster.
FRICTION CAM LOCKING - Securely locks in place to prevent slipping and ensure consistent measurements.
LIGHTWEIGHT DURABLE - Crafted from sturdy plastic weighing just 1.3 lbs for effortless use on the job.
PRECISION ADJUSTABLE GAUGE - Easily calibrate from 1/4" to 4-8" for perfect siding fit every time.
OPTIMIZED FOR CEMENT BOARD SIDING - Specifically designed to support 12' cement-board siding without damage or sticking.

The PacTool International SA903 2-Piece Gecko Gauge is a lightweight, plastic siding gauge designed for precise measurement and installation of cement-board siding panels ranging from 1/4" to 4-8" thickness. Featuring a friction-cam locking mechanism, it ensures secure, slip-free use without assembly, making it an essential tool for professional and DIY siding projects.

Specifications

Manufacturer	PacTool International
Material	Plastic
Item Weight	1.3 Pounds
Assembly Required	No
Product Dimensions	30.48 x 30.48 x 40.64 cm; 589.67 g
Package Weight	0.82 Kilograms
Batteries Required	No
Batteries Included	No

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690.14 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Tunisia.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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