Abstract: A support device is provided for strengthening the hand gripping of racquet handles and other shaft members in the form of an elongated sheet member formed at least in part of resiliently expansible material having means at one end for adjustably securing the member to a shaft to be gripped and an aperture at the other end of the member of a size to closely and expansibly engage the shaft closely adjacent the gripping hand with the spacing of said securing means and aperture being such that the device as mounted on a racquet handle or other shaft member forms a loop which receives the hand with sufficient resilient tension to hold the shaft firmly to the palm of the hand even as the gripping action of the fingers may be relaxed. The device can be a unitary member or a two-part member with overlapped portions aligning with the back of the hand and adjustably secured together by quickly engageable and disengageable means.