Abstract: Golf putter grips for use with the arm-lock putting technique counteract the inherent forward lean of the putter shaft and putter head when the technique is used. In an embodiment the grip is configured to convert a traditional or a body-anchored putter to a putter capable for use with the arm-lock putting technique. The putter grip 100 includes a proximal grip end 110, a distal grip end 120, a medial grip side 170, and a lateral grip side 180. The putter grip 100 covers an upper portion of a conventional putter shaft S. A surface of the putter grip 100 on the lateral grip side 180 is configured to rest in contact with the forearm F of the user during the putting stroke.