Technical data: Brand: Yato Symbol: YT-10662 Series: GRD Material: CrMo|S2 Application: mechanical industry|automotive service|repairs, among others. heads, hubs, spindles, drive systems or gearboxes Surface finish: phosphated Type: impact Blade: hexagonal Tool holder size: 1/2" (12.7 mm) Number of pieces in the set: 9 Set of 9 impact HEX 1/2" key wrenches. Designed for use in the mechanical industry and automotive services during the repair of, among others, heads, hubs, spindles, drive systems or gearboxes. keys made of durable steel phosphated surface 1/2" HEX handle ** Illustrative photo.