OEM Tools 24 INCH STRAIGHT EDGE Use with a Feeler Gauge to Inspect for Distortion on Engine Blocks, Cylinder Heads, Fly Wheels, Main Bearing Saddles, Cam Bearing Saddles, Cam Covers and Bell Housings Constructed with 1/4" Thick Cold Rolled Steel Precision Ground Edge to +/- 0.001" Durable Powder-coat Finish Hang Hole for Convenient Storage Includes Reusable Protective Edge Made in the USA