He's a pin ball wizard... Nissan uses some strange names for their parts. This Pin Ball also know as a pivot ball Stud is wHat your Clutch Release Arm pivots on. These typically don't wear out unless put Under heavy abuse, but do get broken when weilding a large hammer in the wrong direction (not saying how I know that...long story). If your hammer goes astray or youRS is woRN for some other reason, we have them in sTock. Fits push style Clutches.