Review on 📏 Precision Measuring Tool: Central Tools 6429 Straight Edge for Accurate Alignments by Gary Stringfield

I bought this item to check the warping of my engine cylinder heads. Of course, I was able to quickly and easily identify the deformed heads. After my return from the machine shop, I was able to check the correctness of the heads with this ruler. This gives me confidence that the ruler itself is straight. The plastic sleeve covering the machined edge is comfortable to the touch and lubricates the edge to prevent corrosion. For the money this is a great product.