MADE IN USA. This listing is for 8 quantity (enough to do one head) thin profile flex-top locknuts for Harley Panhead rocker block studs. These are the CORRECT style for vibration, oil and heat resistance. Be aware some other sellers are selling the same looking but thicker nuts that are too tall to grip properly. These are exactly what Harley used. You will receive enough to do ONE cylinder head. Please change the quantity to "2" if you need enough to do two cylinder heads or I have another listing for a total of 16 nuts(two heads). IF YOU'VE BEEN USING NYLOCKS, YOU'VE BEEN USING THE WRONG THING! (Cylinder heads in last picture are for example only)