Minsk, Belarus, which I was surprised to discover because I don't typically associate high-precision, quality manufactured tools with Russia; I assumed it was made in Germany, or possibly Japan. But, I'll say this: It goes through wood like a Bat out of Hell. So, be very careful when you fire this baby up. Hold your tool FIRMLY with both hands, because it can run away from you if you allow it to 'dig in' and it can just as easily run into you. As you explore the various angles of attack, do so carefully, like with a feather, because it can dig in and run away from you. I bought this blade to take a tree stump that I'd previously cut close to the ground, down enough that a lawnmower could pass over without hitting the stump. And I was impressed with how well it did that, once I figured out the best way to apply the blade--via my 4" Ridgid Angle Grinder--to the work, which, in my case, was to tilt my grinder at about a 45° angle, in such a way that the top side of the blade SLIGHTLY contacted the stump, and skim across the wood, drawing the grinder toward me, in arcs or straight lines. Once I discovered how to not let the blade 'dig in' and 'take off' on you, the job went very well and that stubborn, gnarly old stump proved to be no match for this blade. It's a great tool, but there is a 'learning curve', so use some scrap wood to 'get to know' how it works, and 'easy does it'.

Can this cut Hardie and Durock cement backer boards?

I have only used this product on wood, but since it has carbide teeth it will cut just about anything short of solid rock. Given the more abrasive material in the concrete backer boards, I would also assume it would not last as long. Good luck.

Looking at this to cut 1/4" channels in 1/4" thick Aluminium. Anyone have any experience with this blade cutting Aluminium with a hand grinder?

Aluminum? I wouldn't use this type of carving disc for metals. I would cut & grind the channel out with a 4.5" x 1/8" thick cut-off wheel on an angle grinder. OR a 6" cut-off blade on a hand saw or radial arm saw. (or best yet, a milling machine) Then you would get a perfect channel.

Can this be used to cut tree roots in the ground?

I've used this blade to cut wood and it works great. It should be able to cut into tree roots with no problems. Depending on how much access you have and root diameter a reciprocating saw and blade can work too.

ASIN	B07KFKWF7F
Best Sellers Rank	#86,097 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #217 in Circular Saw Blades
Brand	GRAFF
Compatible Devices	Angle Grinder
Construction Type	Grinding
Date First Available	November 19, 2018
Grit Material	Tungsten Carbide
Grit Number	50
Grit Type	Medium
Is Discontinued By Manufacturer	No
Item Thickness	4 Millimeters
Item Weight	7.7 ounces
Item model number	Speedcutter 125
Manufacturer	OOO Lemanbel (LLC)
Maximum Rotational Speed	12200 RPM
Product Dimensions	5"L x 5"W
Recommended Uses For Product	Cutting

GRAFF SPEEDCUTTER 5 Wood Carving Disc for Angle Grinder - Circular Saw Blade for Cutting, Sculpting & Shaping - 7/8" Arbor - 125mm

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