Blade: Chrome-vanadium steel, through hardened, chrome-plated.
Standards: Based on ASME B18.3.
Application: Insert hex inch screws into and remove from boreholes, especially in difficult to access areas.
Extra: Space saving ProStar allows the easy removal of each key without moving any others. MagicRing® made from spring steel holds all standard screws tight at various angles (available from 1/8″). The ball end enables the user to work at angles up to 25°.