Abstract: When bolts are fastened to tack a door to a car body by means of a conventional impact wrench, the shavings stick to the surface of the door or car body, thereby to cause the poor coating quality such as a seeding when the inter-coating or finish-coating is performed in the coating procedure. An impact wrench provided is a fastening tool for fastening a bolt gripped by a socket, in a nut. The impact wrench includes a suction cover for covering the surroundings of the socket, and a suction port capable of sucking the atmosphere in the portion covered with the suction cover, and is constituted such that the atmosphere in the suction cover is sucked through the suction port to recover the shavings left at the time of fastening the bolt. This constitution makes it possible to prevent the shavings from being scattered to the surroundings.

Abstract: When bolts are fastened to tack a door to a car body by means of a conventional impact wrench, the shavings stick to the surface of the door or car body, thereby to cause the poor coating quality such as a seeding when the inter-coating or finish-coating is performed in the coating procedure. An impact wrench provided is a fastening tool for fastening a bolt gripped by a socket, in a nut. The impact wrench includes a suction cover for covering the surroundings of the socket, and a suction port capable of sucking the atmosphere in the portion covered with the suction cover, and is constituted such that the atmosphere in the suction cover is sucked through the suction port to recover the shavings left at the time of fastening the bolt. This constitution makes it possible to prevent the shavings from being scattered to the surroundings.

Abstract: A shock-absorbing guardrail that is easy to install and remove that prevents a support post from collapsing by absorbing the shock caused by a car collision thus reducing repair time. The shock-absorbing device is attached to the guard fence between the structure or support post. A mid-filler attachment may have an ohm-shaped cross-section or vertically opened pipe-shaped cross-section. The guard fence and mid-filler attachment may be attached to the support post or structure with removable connectors for faster installation and removal. The shock-absorbing device is designed to absorb collision energy by irreversible deformation of the mid-filler attachment.

Abstract: A unique shock-absorbing bumper device for use in absorbing collision energy in all bumper assembly systems, and more specifically automobiles. A simple efficient structure is designed for ease of installation and removal after impact, and to provide high performance in absorbing colliding energy, which prevents a driver and passengers from severe injury caused by a car colliding with an object. This system may be used in car doors for absorbing side impacts.