Abstract: A hand-held fastening element driving tool comprising a body accommodating a reciprocating actuator. The body carries a barrel wherein a striker is movable. The barrel holds a fastening element magazine. The striker consists of two parts closely fitted to each other. One part is a rectangular member whose cross-section follows the contour of a staple-shaped fastening element. The other member, together with the rectangular member, forms a figure circumscribing the head of a stem-shaped fastening element. The barrel cross-section is made as to suit the shape of the striker.

Abstract: A hand-held fastening element driving tool comprising a housing with a handle. A barrel holder with a barrel is free to move axially in the housing. The barrel holder has a extension enclosed in the housing and is provided with a cylindrical shoulder. This shoulder acts, through the agency of an elastic element, upon a corresponding shoulder of the housing. Another elastic element is fitted between the outer side surface of the barrel holder shoulder and the housing. A fastening element magazine has one end thereof connected to the barrel holder, and its other end is loosely articulated to the handle.

Abstract: An impact wrench comprising a drive shaft, an anvil with impact cams, a striker having a flywheel mass connected to the drive shaft and impact cams connected to the flywheel mass so as to rotate therewith and move axially in relation thereto. The impact wrench includes a device designed for preventing the striker impact cams from interaction with the anvil impact cams until the striker attains a pre-set rotational speed. According to the invention, the flywheel mass and the anvil are immobile axially, whereas the striker impact cams are adapted to move axially in relation to the striker flywheel mass during striker acceleration.