Description FITMENT:Ford 1993 and newer 4.2L/4.6L 2-valve engines,4.6L 4-valve and 5.4L and 6.8L V-8 engines while installing timing chains.Similar to Rotunda 303-448,6024,525219. MATERIAL:Hardened chrome molybdenum steel and coated with black oxide finish.Resistance on rust,deformation and crack.A long lasting finish. AVOID DAMAGE:These Ford engines are not Free Wheeling engines meaning that if the crankshaft is rotated during timing chain installation(Jumped Timing),it can cause significant damage to the Pistons and Valves if the cylinder heads are not removed. CORRECT INSTALLATION POSITION:Easily install over the crankshaft and engine front cover alignment dowel to position the crankshaft at top-dead-center. USAGE:This tool slides easily over the crankshaft and seamlessly locks into place with the wood ruff key.You only need to rotate the crankshaft with tool attached to crank so that the slot in the handle locks into the engine cover alignment dowel pin,ensuring the engine is at the correct TDC point avoiding extreme damage and costly repairs. On May-26-22 at 12:55:50 PDT, seller added the following information: