Easily and securely installed by hand in an ordinary drill hole, self-retaining ball plungers from Carr Lane Mfg. Co. have a flexible design, and compensate for hole tolerances up to .008″. The slotted end of the thermoplastic body expands to compensate in an oversize hole. The sturdy shoulder of the press-fit ball plunger provides a fixed seating position and positively resists detent force. Available in four sizes, the plungers can be installed in a plain hole, with the shoulder exposed, or slightly counterbored for flush installation.