Abstract: The hand harness is a device which shall be used to aid the hands in remaining closed around the boom of a sailboard or a land sailboard. This device works, by first very firmly attaching to the forearm a thick sleeve 12 that covers nearly the entire forearm. The inside of this part is to be made of 1/8 inch thick neoprene that is rubberized on the inside (or other comparable material). Across the top of the forearm is a thick nylon strap 7. In the middle of this thick strap is a loop into which the steel finger 3 is attached. The steel finger 3 starts as a rectanglar piece 8d that starts in the thick loop in the nylon strap on the middle of the top of the forearm. Finger 3 extends down the forearm and across the hand. From here it goes between (in a closed hand position) the first and second fingers (first being the index) and stops just past the point of contact on a firmly grasped boom 1.