3/8-16 Thread for Hurst 3-8-16 and other 3/8-16 Shifters Orignial OEM size about 1.8 inches diameter Excellent heavy weight reproduction for all Camaro high horsepower applications. 3/8-16 Lock Nut Included Excellent heavy weight reproduction for all Camaro high horsepower applications. Chrome balls full 9 oz. weight with correct recessed bottom. High quality material eliminates stripped threads on lighter weight versions. Fits any 3/8" (Hurst) style shifter.