[Size] - Connect 3/8" (F) drive tools to 1/4" (M) drive sockets.. [CR-MO Steel] - Black chrome molybdenum steel provides excellent durability and strength with every impact movement.. [Secure / Firm] - spring-loaded ball detent provides a secure hold onto sockets and the through-hole in the drive end locks onto the tang of impact wrenches or drivers, prevents them from dropping. [Radius Corner Design] - Distributes torque to the inner wall, to avoid stress concentrations that can lead to cracking.. [Application] - For use with impact drivers, ratchets or other tools to convert the drive size. Widely used in automotive repair, DIY hand-making, household maintenance, and most general repairs..
