FTIHTRY 39Pcs Magnetic Nut Driver Set for Impact Drill, Metric & SAE

ALL MAGNET SET INCLUDE: set contains 15 pieces 65MM MAGNETIC nut drivers （6-14mm&1/4"-9/16"），20 pieces 48MM MAGNETIC nut drivers(4-12mm&5/32"-1/2"), ,3piece drill bit adapter and 1pc drill bit extension. CR-V STEEL: this magnet nut drive set is forged from high hardness chrome vanadium steel. The surface is treated with anti-corrosion sand blasting. After the whole high temperature quenching heat treatment, the product has high hardness and is durable. STRONG MAGNET:A premium magnet inside of the 1/4-inch impact nut driver set ,hold the drill bit firmly when fastening or loosing the nut and bolt. ANTI-DROPPING: The leaflet design head fastener with rounded edges grabs the nut from the side rather than the corner to prevent peeling and extend the life. WIDLY APPLICATION: a universal 1/4 "hex shank for a variety of quick-change chucks, various flashlights, and screwdrivers.Widely used in in electric drills, screwdrivers, impact drills, household DIY, auto parts, woodworking, professional machinery maintenance and other fields.