A drill bit includes a pointed head and a bit shaft. A dust suction passage is formed in the bit shaft. A hole with an opening is formed in the pointed head or in a portion of the bit shaft, the portion being near a distal end of the bit shaft. The bit shaft includes a first portion, the first portion including a core and a rib. The core extends in an axial direction, and is thinner than the pointed head. The rib protrudes radially outward from a side surface of the core, and extends over an entire length of the first portion. The dust suction passage extends through the core in the axial direction.

A hydraulic hammer includes a housing and a plurality of splines. The housing defines a chamber extending along a longitudinal axis configured to receive a tool. The splines are disposed on an inner surface of the chamber and extend parallel to the longitudinal axis. Each of the splines has a contact surface configured to slidably guide the tool when disposed within the chamber. A treated layer is applied to the contact surface of each spline, the treated layer configured to withstand approximately between 100 MPa to 320 MPa of pressure applied during an operation of the hydraulic hammer without galling. An interface is defined between the contact surface of the splines and a surface of the tool and is configured to facilitate sliding engagement between the treated layer of the contact surface of the splines and the surface of the tool without lubricant during the operation of the hydraulic hammer.

Disclosed herein is a post repair kit comprising a stake defined by a body, proximal end, and a tapered anchor end. The post repair kit comprises a hammer mechanism comprising a power portion and a reciprocating ram structure, the power portion forcibly driving the reciprocating ram structure in a reciprocating motion. The reciprocating ram structure comprises a rod structure having a proximal end coupled with the power portion. The reciprocating ram structure further comprises an offset member connected to a distal end of the rod structure. The offset member has a first hole and a second hole. The distal end of the rod structure is connected to the first hole, wherein the offset member and the rod structure are connected perpendicular to each other. The reciprocating ram structure further comprises an interchangeable adaptor end tool detachably connected to the offset member using a fastening mechanism at the second hole.

A pneumatic hammer extender arm assembly is provided comprising an elongated extender arm body defining a hammer engaging portion formed at a first end of the body, and a hammerhead engaging portion formed at a second end of the body. A hammerhead is detachably engageable to the hammerhead engaging portion to allow for quick change of the hammerhead without the need for any tools. The hammerhead may alternately be implemented to engage and apply an impact force to a fastener that may be axially offset from the extender arm body.

A universal chisel attachment is an apparatus designed to convert the torque generated by an electric tool into a reciprocal linear motion to drive a chisel member. The apparatus includes a socket adapter, a chisel assembly, a hammering cam mechanism, and a tubular housing. The socket adapter enables the rotational connection of the hammering cam mechanism to a mounting mechanism of the electric tool. The socket adapter also enables the apparatus to be secured to the electric tool. The hammering cam mechanism converts the torque generated by the electric tool to a reciprocal linear motion of the chisel assembly. The chisel assembly enables the carving or cutting of the target object with the apparatus. The tubular housing enables the unobstructed operation of the hammering cam mechanism during operation. The tubular housing also safely retains all the moving components of the hammering cam mechanism to protect the user during operation.

A drill bit for percussion drilling or impact drilling use for cutting reinforcing steel in concrete, wherein the drill bit has a substantially hollow-cylindrical carrier body extending along a geometric drill bit axis, wherein the carrier body has at least one chisel tooth with a substantially radially extending first chisel edge. The first chisel edge is arranged in a middle portion of the chisel tooth, in particular precisely centrally, in the circumferential direction, and the chisel tooth has a second chisel edge extending substantially tangentially to the circumferential direction of the drill bit.