Pro Series Wave-Loc Rod Bolts have a symmetrical "wave" on the shank that eliminates stress risers. Bolts also have a . 0005 to . 0070 in. interference fit to guarantee rod cap alignment and strengthen the connecting rod. Made from ARP2000 alloy with a tensile strength of about 220/000 psi / they handle more than 12/000 lbs. of clamping force. Nuts and lubricant included.