Abstract: A metal wood type golf club head provided with a conically shaped metal sleeve filled with hard polyurethane material and disposed within the club head shell to extend between the club face plate and back end portion of the club head.

Abstract: A method and an apparatus for determining an individual's inaccurate aim in hitting a golf ball. A mirrored surface is disposed at a ball striking surface of a golf club and a golf ball on a location on a generally horizontal surface. The individual, while assuming a normal golf ball hitting stance on the generally horizontal surface, addresses the golf ball with the golf club and aligns the golf club adjacent to the golf ball in a direction believed to be the correct direction of a target. The golf ball is removed and a beam is directed to the mirrored surface. The deviation between a line normal to the mirrored surface and a line between the location and the target is measured, using the beam, as it is reflected from the mirrored surface, to determine the amount of the deviation.