Self-centering mandrel for golf club hosels

A method for utilizing a self-centering laser mandrel system to measure a loft and lie of a hosel of a golf club head, the method comprising:

• securing a golf club head into the self-centering laser mandrel system, the golf club head having an extruded hosel,
• the self-centering laser mandrel system comprising
• a one-piece housing with upper and lower portions, the upper portion comprising a tapered section with a window, the lower portion comprising a plurality of grooves, and a housing bore extending into both of the upper and lower portions,
• a laser disposed within the housing bore within the upper portion, the laser comprising a beam emitter and a laser housing that is at least partially visible through the window, the laser aligned with an outer surface of the one-piece housing to within less than 0.35 milliradian,
• at least one o-ring extending around an inner surface of the lower portion of the housing and disposed within one of the plurality of grooves;
• inserting at least a portion of the extruded hosel into the housing bore of the lower portion of the one-piece housing of the self-centering laser mandrel system, wherein the at least one o-ring disposed within the lower portion encircles the portion of the extruded hosel;
• and
• measuring at least one of the loft and lie of the hosel utilizing the laser.