Made of chrome-vanadium steel with long life and great durability for use. Strong inner hexagon sleeve without magnetic. This set of screwdriver bits shank tools fits most powered corded or cordless drills to drive hex head screws. 9 Pcs hex bit sockets include: 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm, 12mm, 13mm. International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions., Manufacturer: YD