A hammer has a claw assembly that is linearly moveable relative to the head of the hammer so as to improve leverage and range of prying for nail removal. A locking mechanism secures the claw assembly in a position. The locking mechanism may be automatic or manual, and may comprise a ratcheting mechanism with a pawl and rack, or a clamping mechanism with a deflectable sleeve and engaged bar, or a biased pin lock mechanism.

An electric machine tool includes a first actuating device and a second actuating device. The second actuating device is arranged at a distance from the first actuating device. The first actuating device is mechanically connected to the second actuating device by a switching connector which is configured to be loaded in tension only.

The present disclosure elaborates on a prior disclosure related to making a powered impact device. That device could optionally attach to a power tool, have adjustable energy per impact, or have an elongated body so the impact energy is generated close to the impact target. The present disclosure relates to a design of the impacting device using a barrel cam to increase the stroke length and make the stroke length adjustable. Further, the present disclosure also relates to several safety features of the impacting device. These safety features include the ability to discharge any stored energy when not in use, the ability not to be damaged when the drive shaft is driven in the wrong direction, and a push to activate feature that reduces the chances of a potentially destructive air strike. Further, the present disclosure elaborates on alternative tool heads.