INCRA's new line of Precision Squares and 45 degrees, including the G455 Guaranteed 45 Degrees 5-Inch, are the most accurate you will find anywhere. We're so proud of their quality, that "Guaranteed" is more than just our promise, it's our name! Featuring advanced design and fabrication. Our innovative one-piece design uses the most advanced manufacturing methods available to carve out a single monolithic blade from a solid slab of aluminum. This means you won't see the alignment errors that can happen when a separate blade is manually assembled to a separate handle, as in the more common two-piece design. Solid, rugged and beautiful, the hefty construction of the 1/4-inch solid alloy body and the 3/4-inch thick integrated alloy handle just feels right in the palm of your hand. Unlike conventional two-piece designs, the layout angle of our rigid, one-piece body won't get "bent out of shape" when you drop it! Our trademark gold and red hardened anodized surface is not only durable, but beautiful and it won't tarnish like brass.