Wilwood’s Five-bolt drive flanges have a long standing reputation for durability. The five bolt drive flanges are machined from 7075-T6 alloy and have a 24 spline count. Each five bolt drive flange kit includes the end plate with screws and Grade-8 drive bolts with hardened washers. "WARNING: This product contains a chemical known to the State of California to cause cancer and birth defects or other reproductive harm."