Incra G455 Guaranteed 45 Degrees 5-Inch

Incra G455 Guaranteed 45 Degrees 5-Inch

Average Customer Rating: Recommend

These 45° and 90° squares are so precise, they come with a certificate of accuracy that guarantees each one has an angular maximum deviation from nominal of less than 0.001" at any point along the full length of the blade. One-piece, 1/4" thick anodized hardened aluminum alloy blades ensure long-term accuracy.

Product details and pricing info

4 Customer Reviews Posted


A great asset to my shop
I have no way to test this tool except to use it to calibrate my tools and if the woodworking job comes out perfect then I know this tool was dead on for what I use it for. I have 4 Incra guaranteed squares(5" square, 5" 45 degree, 7" square, and 7" 45 degree) and absolutely use them religiously to calibrate all my tools (table saw, jointer, planer, miter saw, band saw, drill press, circular saw, router table, etc.). While they are expensive I learned in an engineering class that you have to pay more for better tolerances and the expense here is well worth it over a cheap square. Yet there are more expensive squares out there and the Incras are "guaranteed" so if they are not perfect they will make it perfect. If you purchase these I don't see how you will be disappointed as they are one of the best asset you can buy for quality work.
2008-06-22, 0 of 0 people found this review helpful, Rated:
Good tool
I don't have a precision weights & measure office in my neighborhood. But from the test I can run from my woodshop it seems to be dead-on. My one complaint is that the angle starts so high on the blade. To tune in my tablesaw, I have to crank the blade almost to max height before I can set it. That's real hassle when you have to switch between 90 and [precisely] 45 as much as I do. Otherwise its good (accurate, solid, easy to use...).
2007-04-27, 2 of 2 people found this review helpful, Rated:
Precision like the other Incra-products
There is not much to say about this product. It is very precise, enabling you to check those miters and get them perfect every time, ajusting tablesaw, bandsaw and other tools. It is solid made, one piece precesion milled block of aluminum, and will provide years of good service. Worth the money for an absolute 45dgr reference.
2003-01-22, 4 of 4 people found this review helpful, Rated:
Precision like the other Incra-products
There is not much to say about this product. It is very precise, enabling you to check those miters and get them perfect every time, ajusting tablesaw, bandsaw and other tools. It is solid made, one piece precesion milled block of aluminum, and will provide years of good service. Worth the money for an absolute 45dgr reference.
2003-01-22, 4 of 4 people found this review helpful, Rated: