Attributes . The square shank allows use of a wrench so more torque can be applied. Alloy steel shank (chrome-vanadium), the highest-quality material known for screwdrivers. Black tip prevents any material shedding in critical productive processes (food industry). Ergonomic design provides greater grip comfort. Exceed ASME B107.600, ISO 2380-1 & ISO 8764-1 standards. Tip size: PH4. Exposed length: 8?. Total Length: 13?. . Names