Product material: CR-V (chrome vanadium steel)；Product size: length 65mm, opposite hexagonal hole size 13mm.This nut driver is designed to quickly and efficiently tighten or loosen nuts, bolts, hooks when installing roller shutters/panels or other projects and save you a lot of time and get the job done.done faster.Just put it in an electric screwdriver and install the nut or flap, no need to worry about spraining your thumb with other tools, reducing wear and tear on your fingers.Compatibility: The 1/4 hexagonal handle is compatible with electric drills, saving time and effort.Application: Good helper for installing hurricane lampshades/panels, Christmas lights, string lights, etc.Quick release wing nut and hook.Box contents: two pieces Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.