Tekton Hard Handle Screwdrivers are made of durable glass-reinforced nylon and are resistant to extreme temperatures, high impacts, chips, cracks, scratches, fuels, grease, and solvents. The handle is refined from a classic square profile and has comfortable contours along the sides that create natural positions for your fingers. We use a molding process that forms the handle around the blade, rather than forcing the blade into a premade handle; the result is a straighter blade that can't twist out. The Phillips tips are truncated, allowing them to fully engage fasteners without bottoming out or slipping. Torx tips are made to Torx dimensional standards and torque specifications for optimal performance in Torx and star fasteners. The tips of the slotted drivers have a thick design that withstands high-torque driving and are machined to the same width as the shaft to fit into narrow recesses. This set includes low-profile rails to keep your screwdrivers organized in shallow drawers or on workbench surfaces.