The present disclosure relates to a method for producing polycrystalline silicon fragments. The process includes (a) providing a polycrystalline silicon rod, (b) working the surface of the silicon rod by means of a hammer or needle hammer to remove at least a portion of a layer of the surface of the polycrystalline silicon rod, and (c) reducing the silicon rod to fragments. Wherein an amount of impact energy expended by the hammer and/or needle hammer is from 1 J to 15 J.

Striking tools are disclosed that include an aluminum head. Striking surfaces may be securely attached to the head by a bushing or other means. In this way, light weight striking tools may be made with greater durability.

Striking tools are disclosed that include an aluminum head. Striking surfaces may be securely attached to the head by a bushing or other means. In this way, light weight striking tools may be made with greater durability.

A replaceable hitting structure for a hammer contains: a body, a handle extending downwardly from a middle portion of the body, and at least one hitting block connected with the body. The body includes an accommodation extension arranged on one end thereof, a housing groove defined in the accommodation extension, and a peripheral trench defined in the housing groove. Each hitting block includes a hammering face formed on a first side thereof, a connecting face arranged on a second side thereof, a coupling post extending outwardly from the connecting face and accommodated in the housing groove, a fixing notch defined on an outer wall of the coupling post, and a positioning ring retained in the fixing notch. When the coupling post is housed in the housing groove, the positioning ring contacts with the peripheral trench of the body, and the connecting face engages with the accommodation portion.

A replaceable hitting structure for a hammer contains: a body, a handle extending downwardly from a middle portion of the body, and at least one hitting block connected with the body. The body includes an accommodation extension arranged on one end thereof, a housing groove defined in the accommodation extension, and a peripheral trench defined in the housing groove. Each hitting block includes a hammering face formed on a first side thereof, a connecting face arranged on a second side thereof, a coupling post extending outwardly from the connecting face and accommodated in the housing groove, a fixing notch defined on an outer wall of the coupling post, and a positioning ring retained in the fixing notch. When the coupling post is housed in the housing groove, the positioning ring contacts with the peripheral trench of the body, and the connecting face engages with the accommodation portion.

A tool including a handle, a head, and a flexible shaft including a plurality of shaft members each connecting the handle with the head. The shaft members include at least one fixed shaft member and at least one floating shaft member. Each of the fixed shaft members is fixedly connected with both the handle and the head, and each of the floating shaft members is reciprocably connected with at least one of the handle and the head.

A tool including a handle, a head, and a flexible shaft including a plurality of shaft members each connecting the handle with the head. The shaft members include at least one fixed shaft member and at least one floating shaft member. Each of the fixed shaft members is fixedly connected with both the handle and the head, and each of the floating shaft members is reciprocably connected with at least one of the handle and the head.

In one example, a system includes a hammer extender having a head formed from an upper layer, a lower layer and a side layer. The hammer extender includes an elongated body portion having a solid core elongated portion and a hollow core elongated portion. One end of the solid core elongated portion is connected to the head, and the other end is connected to the hollow core elongated portion. The hollow core elongated portion can receive and guide a nail during impact. The system may include a hammer having a hammer handle with a hollow interior to store the hammer extender.

In one example, a system includes a hammer extender having a head formed from an upper layer, a lower layer and a side layer. The hammer extender includes an elongated body portion having a solid core elongated portion and a hollow core elongated portion. One end of the solid core elongated portion is connected to the head, and the other end is connected to the hollow core elongated portion. The hollow core elongated portion can receive and guide a nail during impact. The system may include a hammer having a hammer handle with a hollow interior to store the hammer extender.

A breaker hammer for breaking hard objects includes one or multiple striking faces. One striking face has a breaking portion inside. The breaking portion occupies about 80% of the area of the striking face. The breaking portion has a plurality of striking areas protruding from the striking face, thereby effectively striking and breaking hard objects.