A multi-stroke powered safety hammer system includes a hammer having a body, a cylinder within the body, and a piston carried in the cylinder for reciprocal movement therein. The system includes a quick-connect coupling mount on the hammer, the mount having an inner barrel bounding a hollow interior, an outer sleeve for sliding movement over the inner barrel, and an engagement assembly defined by the inner barrel and the outer sleeve for locking an attachment in the interior. The system includes one of many attachments with an engagement portion; when the engagement portion is applied to the quick-connect coupling mount and the hammer is operated, the piston reciprocates to impact the engagement portion. The attachments guide fasteners, remove fasteners, and process materials.

A knife including a body with a first end, a second end opposite the first end, and a longitudinal axis that extends centrally through the first end and the second end. The knife further includes a first scoring tip that points in a first direction, a second scoring tip that points in a second direction opposite the first direction, and a scoring tip axis that extends centrally through the first scoring tip and the second scoring tip. The scoring tip axis is perpendicular to the longitudinal axis. A chisel extends from the second end of the body and the longitudinal axis of the body extends centrally through the chisel.

The self-contained force magnifying tool disclosed herein includes a tool portion, a striker, at least a portion of which is disposed within the tool portion, and a spring, a least a portion of which is disposed within the tool portion. The spring attaches to both the tool portion and the striker. When the striker is pulled by a user, the spring stores mechanical energy. When the user releases the striker, the striker impacts on the tool portion transferring the mechanical energy stored in the spring into a driving force. The force is magnified by a tool disposed on the tool portion of the self-contained force magnifying hand tool and applied to a workpiece.

A chisel includes a body formed of a first material and including a first end having a shank and a second end. The second end includes a first planar side that defines a first plane, a second planar side that defines a second plane, a third side, and a fourth side. The body includes a channel formed in an edge of the second end between the first planar side and the second planar side and extends from the third side to the fourth side. The body includes a longitudinal axis extending through the first and second ends. The chisel includes a head formed of a second material that is harder than the first material. The head is received in the channel and positioned between the first and second planes. The head extends continuously between the third side and the fourth side to define a working surface of the chisel.

A chisel including a body formed of a first material, the body including a first end having a shank, a second end having a protrusion, and a longitudinal axis extending through the first end and the second end. The chisel includes a head formed of a second material that is harder than the first material and including a first end coupled to the second end of the body and defining a recess that receives the protrusion, a second end that is opposite the first end of the head, a cylindrical portion that defines the first end of the head, and a conular portion that extends from the cylindrical portion and toward the second end of the head.

A hammer is provided that includes a handle, a head, a striking insert, and a claw. The hammer provides for a head with a keyed hole to couple to a keyed projection on a striking insert. The head also includes a dovetail projection that couples to the dovetail connection of the claw. Each component may comprise a different material. For example, the striking insert and the claw comprise one material, and the handle and the head comprise another material. In some embodiments, a slotted punch with a magnetic retainer creates a bore through the face of the head and the striking insert to support a fastener (e.g., a nail) within the head.

A flat chisel (1) having a longitudinal axis (7), a shank (2) and a blade-shaped working section (5). The shank (2) has a striking surface (4) perpendicular to the longitudinal axis (7). The working section (5) has a cutting edge (3) that is crosswise to the longitudinal axis (7). The cutting edge (3) is configured so as to be saddle-shaped.

A striking-mechanism body of a handheld power tool at least a first part of the striking-mechanism body, having an impact surface and/or a lateral surface of a first material, and a second part of the striking-mechanism body of a second material, and the first material being more resistant than the second material in terms of at least one material characteristic, the striking-mechanism body being configured as a one-piece steel body so that the first material and the second material are the same, and the first material of the first part body undergoes a heat treatment that differs from that of the second material of the second part of the striking-mechanism body, or the first and the second materials are different, and the first and the second parts are joined together.

A control method for a bore-chiseling portable power tool for machining a substrate by a drill bit includes superimposing a periodic striking on the drill bit at an impact rate and a rotating of the tool holder at a rotational speed in a rotational direction, identifying a material of the substrate being machined by the drill bit by a sensor, adjusting the rotational speed and/or the rotational direction to a first rotational speed and a first rotational direction when the identified material is an iron-based material, and adjusting the rotational speed and/or the rotational direction to a second rotational speed and a second rotational direction when the identified material is a mineral material. The first rotational speed is less than the second rotational speed and the first rotational direction is counter-clockwise and the second rotational direction is clockwise.

A knife including a body having a first end, a second end opposite the first end, and a longitudinal axis that extends centrally through the first end and the second end. The knife further includes a first scoring tip that points in a first direction, a second scoring tip that points in a second direction opposite the first direction, and a scoring tip axis that extends centrally through the first scoring tip and the second scoring tip. The scoring tip axis is perpendicular to the longitudinal axis. A chisel extends from the second end of the body and the longitudinal axis of the body extends centrally through the chisel.