An apparatus including a head having a hammering portion and an oppositely arranged claw portion, the claw portion curving downwardly and away from the top side of the head toward the handle and including a back end with at least four flat ended teeth separated by at least three, substantially equal V-shaped grooves centered on a longitudinal axis of the head with inner edges of each of the V-shaped grooves being tapered along opposite sides of the V-shaped groove from adjacent a front of each of the at least four teeth toward a sharp notch formed at a junction of the sides of the V-shaped groove and from a top side of each of the at least four teeth inwardly toward a bottom side of each of the at least four teeth, the outer two of the at least four teeth having substantially equal terminal widths that are wider than the at least inner two of the at least four teeth and all of the at least four teeth being substantially equal in length.

A device absorbs shock in a pneumatic tool containing a body, a cylinder, a valve unit, a piston member, plural buffer springs, and multiple fitting sleeves. The body includes a grip and a fitting sleeve fitted with the grip. The fitting sleeve has a chamber, a close face formed on a first end thereof, and an opening formed on a second end thereof. Each fitting sleeve is hollow and includes a limitation length forming along a hollow extending direction and shorter than a largest length. Multiple positioning sleeves are defined between a close face of the fitting sleeve and an abutting portion of the cylinder, and the multiple positioning sleeves are hollow so as to accommodate plural buffer springs. Because the limitation length is shorter than the largest length, the plural buffer springs extend out of the multiple positioning sleeves respectively.