Abstract: A cross-point shaped screwdriver has a cylindrical metal shaft with an axis coaxial with an insertion direction for driving a screw having a socket. A bit section, formed on the end of the shaft, has four blades. A circumferential groove is formed in the exterior of each of the blades. The grooves are in a single plane extending across a width of each plane. When the screwdriver engages the screw socket, the grooves substantially align with a top portion of the socket. The grooves provide a clearance between the bit section and upper end of the socket top, thereby reducing wear on the screw socket and permit the driver to engage and drive the screw at a depth that the standard driver can not engage and drive upon. Often the screw is rounded out by a standard driver.

Abstract: A wrench for use in driving a hexagonal nut having a wrench head. The wrench head has upper and lower jaws rigidly joined together. The jaws have several faces that allow the wrench to engage the nut from three different positions. The faces are configured to prevent corner contact with the nut so as to resist rounding the corners off. Further, one drive position is configured to lock the wrench to the nut as torque is being applied.