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A hammer having a spring to augment the magnitude of strike force through application of a sliding weight free-moving as a projectile in a hollow shaft inside the hammer head. The hammer gains impact force through the use of a double impact hammer head with the spring propelling a portion of the inn

A hammer having a spring to augment the magnitude of strike force through application of a sliding weight free-moving as a projectile in a hollow shaft inside the hammer head. The hammer gains impact force through the use of a double impact hammer head with the spring propelling a portion of the inner hammer head mass to a greater velocity than the surrounding position of the head.

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A manually operated hammering tool having means to increase velocity of a portion of a hammer head for impact strike force augmentation, comprising: said hammer head affixed to a handle; an elongated tubular shaft centrally in said hammer head with said tubular shaft positioned lengthwise perpendicu

A manually operated hammering tool having means to increase velocity of a portion of a hammer head for impact strike force augmentation, comprising: said hammer head affixed to a handle; an elongated tubular shaft centrally in said hammer head with said tubular shaft positioned lengthwise perpendicular to said handle, a first end of said tubular shaft closed thermally inside said hammer head, a second end of said tubular shaft closed by an affixed removable strike face of said hammer, said strike face having in inward faced surface in communication with said tubular shaft; a compression spring longitudinally mobile in said tubular shaft towards and away from said terminally closed end, there being a ballast positioned mobile in said tubular shaft between said inward faced surface of said strike face and said compression spring, there being sufficient longitudinal space in said tubular shaft allowing said ballast to compress said spring during increasing velocity of said affixed strike face towards a target with said compressing of said spring providing impulsion to said ballast fly forward with increased velocity to strike said inward faced surface of said strike face upon impact of said hammer head against said target whereby said ballast provides augmented impact force to said hammer head.