Specification magnetic nut drivers includes: SAE:1/4,5/16,3/8,7/16,15/32 &1/2in.Metric: 6,8,10,11,12 & 13mm ; 2in.bits: 1/4in.& PH2 Hex shank diameter: 1/4in Fits most powered corded or cordless drills. Strong inner Hexagon sleeve (with magnetic!!) CR-V STEELAnti rust, anti slip, flexible. Easy to storeMounted on a black clip, easy to use and storage Application Applicable for installing in those hexagon tools, such as pneumatic screwdriver, electric screwdriver, pneumatic drill, electric drill, pistol drill, manual screwdriver, etc.It's widely used in household DIY, auto parts, woodworking, professional machine repairing, etc.