Replacement front lower ball joints can be difficult to find. These premium ball joints allow for easy installation. No more messing around with trying to get the ball joint greased and the dust boot cover installed. These ball joints come already greased and the dust boot installed. You just press it in and install the circlip.
If your ball joint is loose in the control arm (circlip is the only thing keeping the ball joint in the control arm), then a replacement ball joint is not your solution. You will need a replacement control arm.