Will this cut 1/2 cementboard?

It cuts hardie backer board better than cement board because cement board is more of a cemented material with thread inserted.

Can i use this on a 20v drill?

yes you can i use mine with a a ridgid 18 volt drill just make sure it is a drill and not a impact driver

Can this be used to cut 5/16" cement board siding (cemplank), as opposed to backer board?

Absolutely. In fact, I didn't know it would cut backer board. I built a shed with 5/16" hardiboard siding all the way around, and it was one of the life savers of the project.

I want to add trim around windows, can this be used on already installed cement fiber board?

No, the cutting mechanism on the tool needs at least 1” space behind the board in order to travel freely up and down while it cuts

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PacTool International SS424 Backerboard Shear

PacTool International SS424 Backerboard Shear

Product ID: 89625221

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Details

Colour
Green
Material
Alloy Steel
Brand
PacTool
Blade material
Alloy Steel
Product dimensions
27.7L x 8.9W

⚡6.5-amp contractor-grade motor

🌬️Dust-free indoor/outdoor operation

🛠️Solid tool steel reversible blades, 20,000 ft durability

Description

⚡ Cut Clean, Cut Fast, Cut Smart — Own the Job Site!

BUILT TO LAST - Reversible, solid steel blades engineered for 20,000 running feet
DUST FREE EFFICIENCY - Unique design keeps your workspace clean indoors and outdoors
POWER MEETS PORTABILITY - Lightweight 2.67 kg with a powerful 6.5-amp motor for contractor-grade performance
WORK SMARTER NOT HARDER - Cuts faster and easier than traditional score-and-snap methods
PRECISION CUTS EVERY TIME - Straight, clean cuts up to 1/2” thick Hardiebacker fiber cement

The PacTool International SS424 Backerboard Shear is a corded-electric cutting tool designed for professional contractors and serious DIYers. It delivers straight, dust-free cuts up to 1/2” thick fiber cement with a powerful 6.5-amp motor and durable reversible blades made from solid tool steel, lasting up to 20,000 running feet. Lightweight and efficient, it transforms fiber cement cutting into a faster, cleaner, and more cost-effective process.

Specifications

Manufacturer	General Tools & Instruments
Part Number	SS424
Product Dimensions	27.69 x 8.89 x 40.64 cm; 2.67 kg
Item model number	SS424
Colour	Green
Style	Backerboard Shear
Finish	Brushed
Material	Alloy Steel
Power Source	corded-electric
Item Package Quantity	1
Handle material	Alloy Steel
Blade edge	Straight
Included Components	PacTool International SS424 Backerboard Shear
Batteries included?	No
Batteries Required?	No
Item Weight	2.67 kg

Reviews

V**A

Waste of money. Not fit for purpose.

0 stars. Bought 2 as have 50 sheets of 12mm cement board to cut and both have sheared and broke after 1 hour. Don't waste your money.

18.03.2025

A**R

Not robust enough for the price

Worked well while it worked, however the cutting blade sheered off after about an hours use. The blade is not made from sufficiently strong material to last and the manufacturer does not sell replacement parts. Overall not worth purchasing unless you are only doing small and occasional tasks.

11.06.2025

F**1

UK plug needed

Great tool but nowhere does it state its a two pin plug you receive so if you were expecting to use it straight away using a 3 pin 240v appliance plug you would be very disappointed. Of little use in the UK originates from the USA.

15.02.2023

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