This heavy duty crankshaft turning nut easily installs through the harmonic balancer and into the end of the crankshaft with the included grade 8 bolt. Once that's done, your balancer is held securely, and you have turning nut that is ready to rotate whenever necessary.
Features:

• Heavy-Duty Model
• Fits Big Block Chevy Engine Crankshafts
• Made from High-Quality Steel
• Black-Oxide Finish
• 1-inch Stud Length
• Sold Individually