Screwdriver with slotted blades

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