Mormon temple wrote:We will now give unto you the First Token of the Melchizedek Priesthood, or the Sign of the Nail, with its accompanying name and sign. This token is received by bringing the right hand into this position: the hand vertical, the fingers close together, and the thumb extended; and the person giving the token placing the tip of the forefinger of his right hand in the center of the palm, and the thumb opposite on the back of the hand of the one receiving it, in this manner. We desire all to receive it.
First Token of the Melchizedek Priesthood

Mormon temple wrote:We will now give unto you the Second Token of the Melchizedek Priesthood, the Patriarchal Grip, or Sure Sign of the Nail, with its accompanying sign.
This token has reference to the crucifixion of the Savior. When he was placed upon the cross, the crucifiers drove nails through the palms of his hands, then fearing that the weight of his body would cause the nails to tear through the flesh of the hands, they drove nails through his wrists. Hence, in the palm is the Sign of the Nail, and in the wrist is the Sure Sign of the Nail, or the Nail in the Sure place.
Second Token of the Melchizedek Priesthood

President NelSatan prepares to slit his own throat before the temple altar.

Temple penalties make blood flow at the Mormon temple altar