Sherwood Series J400 HSS Drill Blanks are precision-engineered from high-quality High Speed Steel (HSS) for superior durability and strength. Each fully hardened, jobber length blank is accurately ground with a diameter tolerance of h8, ensuring optimal performance without back taper. Available in a range of metric sizes, these drill blanks offer exceptional resilience for demanding applications. Features and Benefits Accurately ground without a back taper Manufactured from High Speed Steel (HSS) for resilience Available in a variety of metric sizes to suit your needs Hardened and ground all over for enhanced durability Typical Applications Gauging the diameter of a drilled hole or for forging custom tools and drill bits Standards DIN 338