Mr.Gasket Harmonic Balancer Bolt Kit is made of a Grade 8 alloy and is heat-treated for extra strength and durability. Designed with a high hex head, they prevent socket slippage and an extra-thick washer provides an accurate and uniform torque. Mr.Gasket Harmonic Balancer Bolt Kit is manufactured using first-rate materials, great precision, and advanced equipment to ensure a perfect fit and function. The harmonic balancer bolt kit by Mr.Gasket is designed to withstand extreme temperatures and pressures that will help you to make the most of your racing or muscle car. Mr.Gasket products are designed for high-speed enthusiasts who depend on the durability and superior quality. So, upgrade your ride with top-of-the-line products by Mr. Gasket that will take your driving experience to the next level.